Why the noble gases are found in small amounts in the earth's atmosphere?

Answers

Answer 1

Answer:

They have completely filled outermost shell

Explanation:

The noble gases are the rarest and occur in trace amounts in the atmosphere because they have completely filled outermost and this makes them unreactive with other elements.

Elements become abundant as they combine with other species to form compounds.

Noble gases on the other hand have a high level of stability and do not readily combine with other species.

Some of these gases are :

        Helium

        Neon

        Argon

        Krypton

        Xenon

       Radon

They have very high ionization energy and very low electron affinity and so will not readily react.


Related Questions

Explain the law of conservation of mass.

Answers

Answer:

The law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed.

Explanation:

Your answer should be- that in a chemical reaction mass is neither created nor destroyed.

Explanation:

Is that good?

I WILL GIVE YOU BRAINLIEST!!!

which sentence uses emitting correctly

A after emitting his mistake, Charlie vowed to make things better.

B Charlie should be emitting an apology.

C Charlie heard birds emitting a very strange sound.

D the emitting sound of an early moring birds woke charlie.

Answers

Answer:

its either A or C

Explanation:

Q) which sentence uses emitting correctly ?

Answer :(c) Charlie heard birds emitting a very strange sound .

Explanation :

Emitting means ' to give off ' , since birds are giving off a strange sound , we say " Charlie heard birds emitting a very strange sound " .

Define Each Piece of the Microscope


Describe What Each Microscope Lens Does



Describe How The Microscope Magnification Lens Works

Answers

1) Body tube (Head): The body tube connects the eyepiece to the objective lenses. Arm: The arm connects the body tube to the base of the microscope. Coarse adjustment: Brings the specimen into general focus. Fine adjustment: Fine tunes the focus and increases the detail of the specimen.

2)Microscopes are made up of lenses for magnification, each with their own magnification powers. Depending on the type of lens, it will magnify the specimen according to its focal strength.

3)In simple magnification, light from an object passes through a biconvex lens and is bent (refracted) towards your eye. ... The eyepiece lens usually magnifies 10x, and a typical objective lens magnifies 40x. (Microscopes usually come with a set of objective lenses that can be interchanged to vary the magnification.)

The density of a material is a/an

Answers

Density is a measure of mass per volume, and the average density of an object equals its total mass divided by its total volume
Hope this helps :)

i'll mark brainliest if you can answer this quick and correctly only correct cause i don't accept bad answers or i'll report you if i get a bad grade
'

Answers

3) A
4) C
brainliest ?

Which is the state of matter shown in this figure ?

Answers

Answer:

It looks like a solid because they are densely packed kind of like an ice cube

Explanation:

The state of matter shown in this figure is solid state, because the particles are arranged densely in the form of cube.

What is solid state ?

The state of matter known as a solid has a definite form, mass, and volume. Changing the temperature causes extremely little variations in volume to be seen. For instance, sand, wood, copper, ice, etc., cannot be crushed.

One of the three fundamental states of matter, along with liquid and gas. Since atoms' energy drops when they adopt a comparatively organized, three-dimensional structure, solids can emerge from liquids or gases.

Because solids have specific mass, volume, and form, their component particles are arranged compactly. Between molecules, there is little intermolecular space. As a result, there is a strong force between the constituent particles (atoms, molecules, or ions).

Thus, option A is correct.

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.What threatens the newly hatched chicks?

Answers

Answer:

rats. that's all i know of Just about everything except the mother hen if they are natural hatch. Even when you incubate them there are threats. The healthy chicks will mob the weak ones, the older chicks (even by a day) will pick on the younger ones. Temperature extremes will threaten them as they need warm, humid conditions with gradual drops in surrounding temps in the brooder box. Early disease is sometimes a problem and all chicks should be started on medicated chick feed for the first few weeks to prevent several digestive diseases. Even the water dispenser can be a threat as newly hatched chicks will immerse themselves in an open water container so care should be taken to supply water in a self feeding covered dish.

Explanation:

Answer:

im pretty sure its just rats and the mother hen if the chick isn't healthy

Explanation:

9. First identify the following as either homogeneous substances or
heterogeneous mixtures. Then further classify as either elements,
compounds or mixtures:
a. Earth
i. Air
b. H(9) I
j. CuSO4(s)
C. Cuso, (aq)
k. NaCl (1)
d. Magnesium solid
1. Methane gas
e. Na (s)
m. Antimony (1)
f. Sugar (1)
n. H20 (1)
g. C.H2O. (aq)
o. 02 (9)
h. NaCl (aq)
p. CO (9)

Answers

Answer:

a few days ago of course I was a in the my life pro chef chef cooking channels and then the first first place to for the you know what do not you can be you know how much

Explain how your answer to CTQ 6 is consistent with your answer to CTQ 5.

Answers

Answer:

up 1

Explanation:

A sample has a PH of 4, and another sample has a PH of 9. Which sub is the base? How many times basic is it??

Answers

Answer:

the first one

Explanation:

the first one is the base because it has a lower PH

One of the pieces of evidence supporting energy quantization was the line spectra of elements. Why does this demonstrate energy quantization?
a) Photons are packets of energy that act both as a particle and a wave.
b) The spectra is continuous and shows emission at all wavelengths.
c) There are sharp emission lines demonstrating discrete energy levels.
d) All compounds emit light in the ultraviolet and visible regions specifically.​

Answers

Answer:

c) There are sharp emission lines demonstrating discrete energy levels.

Explanation:

When an element emits energy in the form of radiation, it produces a spectrum of colors on a photographic plate. This spectrum can either be continuous or discrete. In continuous spectrum the spectrum continues without any discrimination between two regions. This represents the continuous emission of radiation, and thus the continuous emission of energy without any break.

On the other hand, the line spectrum consists of discrete and sharp lines, which shows the emission of radiation in a certain amount in a certain time, with a break between emission. Hence, the line spectra supports the quantization of energy.

The correct option is:

c) There are sharp emission lines demonstrating discrete energy levels.

What is a hypothesis? A. a statement that can be tested through a scientific investigation В. a statement that summarizes the results of an experiment C. a question that cannot be scientifically tested D. a description of the steps involved in an experiment​

Answers

Answer:

A

Explanation:

Hope this helps :)

I think the answer is A hope it helps.

What are the solvent and solute in a solution containing 100 grams of ethanol and 3 grams of sucrose?

Answers

Answer: I think the ethanol in the solute and the sucrose is the solvent. Hope this helps!

Explanation: i learned this last year I think it is right?

A solvent is a chemical that dissolves a solute to produce a uniform solution. A solute is a substance that dissolves in a solvent, resulting in a homogeneous mixture. The solute is sucrose, and the solvent is ethanol.

What is meant by solution ?A solution is a well-mixed solution in a solvent of one or more dissolved solutes. A solute is a substance that dissolves another substance, creating a continuous medium. A solute is a substance that dissolves in a solvent, resulting in a homogeneous mixture.A solution is formed when one substance dissolves or degrades into another. A solute is any substance that dissolves to form a solution. A solvent is a chemical that is used to disperse a solute. The solute in a sugar-water solution is sugar, and the solvent is water. A solution is a homogeneous mixture of two or more particles with diameters less than one Nano meter.

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determine the density of a liquid if 75 mL of the liquid have a mass of 63 g

Answers

Answer:

The answer is 0.84 g/mL

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

From the question

mass = 63 g

volume = 75 mL

We have

[tex]density = \frac{63}{75} = \frac{21}{25} \\ [/tex]

We have the final answer as

0.84 g/mL

Hope this helps you

How much force is required to accelerate a 12 kg mass at 5 m/s2?

Answers

Answer:

The answer is 60 N

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 12 × 5

We have the final answer as

60 N

Hope this helps you

Political considerations played a great role in the decision for the United States to enter the Space
Race.
True
False

Answers

True

The Cold War & tensions with Russia led to the great Space Race. Getting into space was a goal of the US as well as Russia and whomever got into space would be considered superior in the world's perspective

How can charged objects interact without touching

Answers

Electrostatic forces are non-contact forces; they pull or push on objects without touching them. Rubbing some materials together can result in something called 'charge' being moved from one surface to the other. Charged objects pull on other uncharged objects and may either push or pull on other charged objects(hopefully this helps)

Use the information given to calculate the average atomic mass of element Z. Z- 56 is 70% abundant and Z-59 is 30% abundant.​

Answers

Answer:

56.9 amu

Explanation:

Depending on the number of isotopes an element has, the Average atomic mass of isotopes of an element can be calculated using:

(atomic mass of isotope1 × decimal abundance of isotope1) + (atomic mass of isotope2 × decimal abundance of isotope2)

According to this question, two isotopes of element Z were given

- Isotope Z- 56 with atomic mass 56 is 70% abundance. This means that its decimal abundance is 0.70

- Isotope Z- 59 with atomic mass 59 is 30% abundance. This means that its decimal abundance is 0.30

Therefore, average atomic mass of element Z is:

= (56 × 0.70) + (59 × 0.30)

= (39.2) + (17.7)

= 56.9

the human eye has three types of cones cells. damage to any one of the types of cone cells doesn't cause total blindness because of the
A. presence of rod cells
B. other two functional Cone cells
C. presence of optic nerves

Answers

they have rod cells - this helps them be able to see colors through a spectrrum located in the retina

CAN SOMEONE PLEASE HELP ME WITH THIS QUESTION

Wrong or inproper answer will be reported

Answers

The mass of unreacted zinc = 13 g

Further explanation

The reaction equation is the chemical formula of reactants and products

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reactants and products

Reaction

[tex]\tt Zn+2HCl\Rightarrow ZnCl_2+H_2[/tex]

mol ratio Zn : HCl = 1 : 2

mol of HCl

[tex]\tt mol=V\times M\\\\mol=0.1~L(100~cm^3)\times 2~mol/L\\\\mol=0.2[/tex]

mol of Zn

[tex]\tt \dfrac{1}{2}\times 0.2=0.1~mol[/tex]

the mass of reacted Zn  :

[tex]\tt 0.1\times 65=6.5~g[/tex]

the mass of unreacted Zn

[tex]\tt 19.5-6.5=\boxed{\bold{13~g}}[/tex]

How to do ionic equations

Answers

Answer:

Write the ionic equation by breaking all the soluble ionic compounds into their respective ions. Each ion should be shown with its charge and an to show that it is present in solution. Use coefficients to show the number of each ion present.

Explanation:

Hope this helps and I hope you have a wonderful day! Spread the love!

what is the basis of modern periodic table?

Answers

Explanation:

The periodic table is an arrangement of the chemical elements, organized on the basis of their atomic numbers, electron configurations and recurring chemical properties.

I hope this helps with periodic table

does anyone know how to do this??????

Answers

Answer:

you have to answer about what Emmy Noether was known for and how she accomplished her goal! For example Dr. Martin Luther King was known for his peaceful protests and his famous "I Have a Dream". He accomplished this goal by never giving up and sticking to his morals! I hope this helped!! ♡♡ (BTW love your profile picture)

When you mix copper and tin, you make bronze. No chemical reaction occurs.
What is bronze?
O A. An element
B. A compound
O C. An alloy
O D. A molecule
SUBMIT

Answers

A or the 3 option cause the bronze is metal and metal is Ike alloy and it has a element soooo what a crazy teacher

Answer:

C. Alloy

Explanation:

Bronze is an alloy because the creations of alloys are not chemical reactions. An alloy is made when a metal is combined with another metal or a nonmetal.

Explain why you cannot use a pump like the one at the right to
lift water up to the 3rd floor of an apartment building.

Answers

Answer:

can you aks it more clerlry

Explanation:

What does a subscript indicate in a chemical formula?

A. The number of atoms of that element in the molecule

B. The number of bonds that element forms in the molecule

C. The position in the molecule that element occupies

D. The atomic number of the element in the molecule

Answers

A the number of atoms of that element in the molecule

Answer:

The number of atoms of that element in the molecule

Explanation:

You're welcome

A student dissolved a 0.139g sample of oxalic acid, H2C2O4, in water in an Erlenmeyer flask. Then the student titrated the H2C2O4 solution in the flask with a solution of KMnO4, which has a dark purple color. The balanced chemical equation for the reaction that occurred during the titration is shown above. (a) Identify the species that was reduced in the titration reaction. Justify your answer in terms of oxidation numbers.

Answers

Answer:

MnO4 − was reduced

C2 O4^2- was oxidized

Explanation:

2MnO4 −(aq)  +5H +(aq)  +2 C2 O4^2-(aq)  +6H+(aq)  →2Mn2+(aq) + 10CO2(g)  +8H2 O(l)

A redox reaction is characterized by a change in the oxidation number of reacting species from left to right in the reaction equation.

If we look at Manganese, its oxidation number was decreased from +7 on the left hand side to +2 on the right hand side. This implies that it gained five electrons. recall that reduction refers to electron gain.

If we look at carbon, its oxidation number increased from +3 on the left hand side to +4 on the right hand side. This indicates loss of one electron and oxidation refers to electron loss.

MnO₄⁻ was reduced and C₂O₄²⁻ was oxidized in the titration.

The balanced chemical equation for the reaction can be expressed as:

[tex]\mathbf{6H^+_{(aq0} + 2MnO_4^-_{(aq)} + 5H_2C_2O_4 _{(aq)} \to 10CO_{2(g)} +8H_2O_{(l)} + 2Mn^{2+}_{(aq)}}[/tex]

A redox reaction can be described by a variation in the oxidation number of reacting species in the chemical reaction equation from the reactant side to the product side

Oxidation takes place when a substance(atom, molecule, or compound) loses an electronReduction occurs when a substance gains an electron.

Let consider Mn in MnO₄⁻, its oxidation number was decreased from +7 on the reactant side to +2 on the product side. This shows a gain of additional five electrons.

Thus, MnO₄⁻ is reduced.

Also in C₂O₄²⁻, the oxidation number of carbon increases from +3 on the reactant side to +4 on the product side. Since an electron is lost, then oxidation  occurs at C₂O₄²⁻  

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1. Which family of elements is most likely to lose electrons?
2. Which family of elements is most likely to gain electrons?

Answers

Answer:

Elements that are metals tend to lose electrons and become positively charged ions called cations.

Elements that are nonmetals tend to gain electrons and become negatively charged ions called anions.

Hope it helps:)

Metal are the  family of elements which is most likely to lose electrons. Non metals are the  family of elements which is most likely to gain electrons.

What is element?

The quantity of protons an element has defines it. An element's atoms all contain the same amount of protons, but its electron and neutron counts might vary. Ions are produced by altering the electron to proton ratio, whereas isotopes are produced by altering the neutron count.

118 known elements are present. A study is being done to create element 120.1. The periodic table will have to be modified to include element 120 after it has been created and validated. Metal are the  family of elements which is most likely to lose electrons.

Therefore,  metal are the  family of elements which is most likely to lose electrons.

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i need help ' please

Answers

Answer:

s orbitals - spherical shape

p orbitals - dumbbell shape

d orbitals- dxy, dyz , dzx -double dumbbell

- dx²-y²- double dumbbell (along axis)

-dz² -dumbbell with electron cloud

( along the axis)

therefore here the answer is 2s and 3s

What would be the pH after mixing!!

Answers

pH3-4. It says suggest so try getting a close and appropriate answer after adding an acid to an alkaline.
Other Questions
Peter says there are two distances for which he and Maria charge the same amount. To prove Peter is not correct, Maria graphs a line for her delivery charges and a line for Peters delivery charges. Each line represents the relationship between the amount (y), in dollars, each person charges for a delivery and the distance (x), in miles, each drives for the delivery. Without showing the graph, explain how Marias graph of the two lines proves Peter is not correct. An aluminium atom has a mass number of 27 and a proton number of 13. How many neutrons does this aluminium atom contain? Combat Fire, Inc. manufactures steel cylinders and nozzles for two models of fire extinguishers: (1) a home fire extinguisher and (2) a commercial fire extinguisher. The home model is a high-volume (54,000 units), half-gallon cylinder that holds 2 1/2 pounds of multi-purpose dry chemical at 480 PSI. The commercial model is a low-volume (10,200 units), two-gallon cylinder that holds 10 pounds of multi-purpose dry chemical at 390 PSI. Both products require 1.5 hours of direct labor for completion. Therefore, total annual direct labor hours are 96,300 or [1.5 hours (54,000 + 10,200)]. Expected annual manufacturing overhead is $1,570,706. Thus, the predetermined overhead rate is $16.31 or ($1,570,706 96,300) per direct labor hour. The direct materials cost per unit is $18.50 for the home model and $26.50 for the commercial model. The direct labor cost is $19 per unit for both the home and the commercial models.The companys managers identified six activity cost pools and related cost drivers and accumulated overhead by cost pool as follows. Expected Use of Drivers by ProductActivity Cost Estimated Expected Use ofCost Pools Drivers Overhead Cost Drivers Home CommercialReceiving Pounds $87,100 335,000 215,000 120,000Forming Machine hours 157,500 35,000 27,000 8,000Assembling Number of parts 390,600 217,000 165,000 52,000Testing Number of tests 61,200 25,500 15,500 10,000Painting Gallons 36,806 5,258 3,680 1,578Packing and Pounds 837,500 335,000 215,000 120,000shipping $1,570,7061.) Under traditional product costing, compute the total unit cost of each product. (Round answers to 2 decimal places, e.g. 12.25.)2.) Under ABC, complete the schedule showing the computations of the activity-based overhead rates (per cost driver). (Round your answers to 2 decimal places, e.g. 2.25.)3.) Complete the schedule assigning each activity's overhead cost pool to each product based on the use of cost drivers. (Use rates from part b above and round cost assigned to 0 decimal places, e.g. 12,250. Round overhead per unit to 2 decimal places, e.g. 2.25. Note that due to rounding your total cost assigned will be slightly different than calculated above.)Cost Driver Home ModelCommercial ModelCost Assigned4.) Compute the total cost per unit for each product under ABC. (Round your answers to 2 decimal places, e.g. 12.25.)Home Model $Commercial Model $5.)Classify each of the activities as a value-added activity or a non-value-added activity.ActivityReceiving value-addednon-value-addedForming non-value-addedvalue-addedAssembling value-addednon-value-addedTesting value-addednon-value-addedPainting non-value-addedvalue-addedPacking and shipping value-addednon-value-added Dave earned $12 for mowing 4 lawns. What is the rate earned per lawn mowed? Ashleigh hires a group of security staff. Each worker works an average of 80 hours per month at $14/hour. If her monthly labor cost for security workers is $23,520, how many security workers did Ashleigh hire? a) 15 b) 21 c) 36 d) 47 4 less than a number g equals 9Answer fast I will name you the most Brainly please help This question. Help. HELP Which of the following was not a consequence of the Industrial Revolution?(K12 Answers plz) The story is GideonCheck the boxes that describe the setting of the story.wine pressaltar of Baalwheat fieldsEphraimfarm in OphrahManasseh 10x-6y=-48 standard to slope intercept form in the Jewish 10 commandments, what is the significance of graven images Listen and choose the option that best answers the question.Select the best summary of the advice about safe driving that Paulina follows. Follow the speed limit. Text when at stop signs. Use hands-free phones. Respect traffic signs. Music slowing down is called what?A. ritardandoB. accelerandoC. crescendoD. piano What is an active site? A )a gland that secretes a particular enzymeB) a part of an enzyme molecule into which a substrate molecules fitsC)a part of the substrate to which an enzyme molecule attachesD)a place in the body where an enzyme works what is 0.345 in standard form PLEASE HELP ASAP!! IF YOU CAN please help me fix this sentence! there's 5 mistakes In 1957. tennis player Althena Gibson won the womans championship at Wimbledon later that year, she became the 1st African American woman to win the us open. (5) Letter: 8.5 inches by 11 inches Legal: 8.5 inches by 14 inches Junior legal: 5 inches by 8 inches Tabloid: 11 inches by 17 inches a. Are any of the paper sizes similar? b. The dimensions of government-letter paper are each 0.5 inch less than the dimensions of letter paper. Are these paper sizes similar? Question 2 c. By increasing the shorter side of legal paper by inch, it is similar to the size of junior legal paper. Why does the surgeon draw on the patient before surgery? (A) It is the name of all the surgical team members so the patient can use their names during surgery. (B)It is a physical reconfirmation that the surgery will take place on that limb or part of the body. I(C)ts an autograph; it brings good luck. (D)It is a record of the time the surgeon first saw the patient that day. What unit do we measure force in?