Chemistry High School

I need help with atomic numbers can you please teach me and tell me the answer you will get 10 points








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I Need Help With Atomic Numbers Can You Please Teach Me And Tell Me The Answer You Will Get 10 Points

Answers

Answer 1

Answer:

[tex]\frac{6}{3} Li^{-}[/tex]

Explanation:

The number of protons and neutrons together create total atomic mass.

The number of protons determine what element it is on the Periodic Table.

The number of electrons v protons determine the charge of the atom.

Protons are positive, electrons are negative, neutrons have no charge.

Since there is 1 more electron than protons, the overall charge is going to be -1.

We are given that there are 3 protons, so that gives us the Lithium element with a -1 charge.

Add up the 3 protons with the 3 neutrons and we get 6 as the total atomic mass in this atom.

Related Questions

at 100c the vapour pressure of a solution of 6.5g of solute in 100g of water is 732mm if kb is 0.52 k/m the boiling point of solution will be

Answers

Answer:101.105⁰c

Explanation:

which should I choose?

Answers

Answer:

liquid

Explanation:

thank me

a. 165 lbs = ?? g
b. 12.01 cm = ?? m

Answers

Answer:

a) 74842.7 g

b) 0.1201 m

Explanation:

1 pound is 453.592 g  

165 pound = 74842.7 g

12.01 / 100 = 0.1201 m

10g sugar is dissolved in 90g water.The density of the solution is 1.09g/ml.Calculate mass/volume percentage concentration of the solution.​

Answers

The concentration of a solution is a measure of the amount of solute dissolved in a solvent. There are many ways to indicate concentration; molarity, molality, normality, and %(w/v)#. To prepare a 10% glucose solution, mass out 10 g glucose (solute), and add enough water (solvent) to make a 100 mL solution.

2. Briefly describe how the law of conservation of mass was developed.

Answers

Answer:

History of the Law of the Conservation of Mass

The ancient Greeks first proposed the idea that the total amount of matter in the universe is constant.This law states that, despite chemical reactions or physical transformations, mass is conserved that is, it cannot be created or destroyed within an isolated system.

Explanation:

HELP!!! What two volume units have the same value?

Answers

Answer:

1milliliter=1cubic centimeter

Answer:

volume and density I'm pretty sure

Which part of an atom is mostly empty space? nucleus proton cloud electron cloud neutron

Answers

Answer:

its C

Explanation:

Cloud electron is a part of an atom is mostly empty space. Hence option D is correct.

What is atom?

It is the smallest unit of matter that possess the properties of the chemical element. It can’t be an independently, they form ions and molecules they both are combine and form large numbers of matters.

Every solid, liquid, gas, and plasma are composed of neutral or ionized atoms.

Atoms are basically three types: Neutrons, protons and electrons. In atoms there are two regions:

The nucleus (with protons and neutrons)Positive charge

Electron clouds: Most of the volume of an atom.

The region where the electrons can be found (mostly empty space). Cloud electron is a part of an atom is mostly empty space. Hence option D is correct.

Learn more about atoms, here:

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A student wants to see how temperature affects the
production of gases when yeast and water are mixed. She
mixes them at different temperatures in clean soda
bottles. She then places a balloon over the top of each
bottle.
Which statement best describes the use of the balloons in this experiment?

Answers

Answer:

To monitor Pressure increase

Explanation:

the more pressure, the higher the production of the gas, which can be recorded, more pressure meaning higher production. Then vary the temperature.

Answer: Logical, Because it allows the student to catch any invisible gases given off. I hope this helps

Explanation:

PLEASE HELP
You have four water samples at different temperatures. In which sample are the molecules vibrating at the fastest speed?
O A. water at 37°C
O
B. water at 99°C
C. water at 99°F
OD. water at 299K

Answers

B water at 99c since it is the hottest

You want to place a piece of glass tubing into a ruber stopper after the tubing has been fire polished and cooled. This is best done by

Answers

Answer:

All of the above

Explanation:

This is correct

Plz answer these questions :

​

Answers

Answer:   2) see below

                 3) 2AgCl → 2Ag + Cl₂

Explanation:

2)

Step 1: Crushing & Grinding   CuFeS₂(s)→  CuFeS₂(s)

Step 2: Froth Flotation           CuFeS₂(s)---->  CuFeS₂ (l)

Step 3: Roasting   2CuFeS₂(l) + 3O₂(g) → 2FeO(s) + 2CuS(s) + 2SO₂(g)

Step 4: Converting matte to blister Cu₂S(l) + O₂(g) → 2Cu(l) + SO₂(g)

Step 5: Anode Casting           Cu(l) → Cu(s)

Step 6: Electrolytic Refining   Cu(s) → Cu(s)

            Anode: Cu(s) → Cu₂ + (aq) + 2e-

                     Cathode: Cu2 + (aq) + 2e- → Cu(s)

see diagram below for illustration of steps

3) When silver chloride (solid) is exposed to sunlight, it decomposes into silver (solid) and chlorine (gas).

The equation is written as:  [tex]2AgCl_{(s)}\xrightarrow{\text{sunlight}}}2Ag_{(s)}+Cl_{2(g)}[/tex]

HIFT|d/c/ 113 r 12
a b/c 9.416666667
ard Deviation SD (MODE 2
Data: 20X5, 30X4, 40, 10X6
ALPHA SC SC1
20 ALPHA 5 DATA 3
[1] 6][ALPHA
SHIFT
3 a b/d 40
9r5r 12
10 aim
160 mt at
and
helium
5. sample 07
25 degree
occupies
volume
volume of
it occupy 17
the
IS
will
dear
pressure
degree celsius. What
eased
to
8 atm
at
constant
temperature?​

Answers

Answer:

hey guys are doing. . I have been in business for a new job and I will be a great time , and I will be a good time

Explanation:

for me, but the best. . the first one. . the first one

Red dye can be made from a mixture of yellow dye and magenta (a deep purplish red) dye. How could you determine if a particular red dye is made from a single dye or from a mixture of yellow and magenta dyes?

Answers

Answer:

When preforming the experiment the red dye will separate if it had other dyes included in it

Explanation:

Paper chromatography is a good way of separating coloured substances mixed together in a solution. During chromatography, the solvent soaks up the paper past the spot of the mixture and the different substances move upwards too. They move different distances depending on what kind of substance they are, what the solvent is and how far the solvent itself travels.

Currents shape rivers over long periods of time.
Please select the best answer from the choices provided
True
False

Answers

Answer:

True

Explanation:

Most rivers begins life as a tiny stream running down a mountain slope..... small streams meet and join together, growing larger and larger until the flow can be called river. On its way down, the water shapes the landscape by wearing away rocks and carving out a network of valley.

PLZ HELP!! ILL MARK BRAINLIEST!! What claim do ghost hunters make about energy-detecting devices? They can determine how many spirits are in one location. They can produce sounds that may be confused with ghosts. They can sense the presence of spiritual energy. They can distinguish good spirits from evil spirits.

Answers

Answer:

[See Below]

Explanation:

I mean they say all those things , but if it has to do with just the device I'm guessing it'd most likely be They can sense the presence of spiritual energy  since they claim it's the device they are using to tell them if there is something there they can't see.

Answer:

The Awnser is C (pls give me brainliest if this awnser is correct)

Explanation:

Which of the following are common behaviors of scientists? a.doing background research b. testing ideas with experiments c. analyzing data from tests d. reporting results to others e. all of the above​

Answers

Answer:

Explanation: It is B. all above

The sodium atom loses an electron to form a sodium Ion (Na+). Which statement is correct with respect to its atomic radius?
O A. The sodium ion has a larger radius than the atom.
OB.
The sodium lon has a smaller radius than the atom.
OC.
The sodium ion and the sodium atom radil are the same size.
OD
The sodium ion has twice the radius of the sodium atom.

Answers

Answer:

sodium ion has smaller radius than a atom.

Explanation:

Calculate the cell potential, Ecell, of a concentration cell containing a 0.1 M solution of Zn2 and a 1.0 M solution of Zn2

Answers

Answer:

The cell potential is 0.0296V

Explanation:

Please see the attachment below

Is the following statement a fact,, opinion, or theory? Why?
Scrambled eggs are better for breakfast than cereal. I can stay full longer if I eat eggs.​

Answers

Answer:

i think opinion cause you could be saying in my opinion, scrambled eggs are better for breakfast than cereal.

Which of the following is a compound?
Select the correct answer below:
Water
Sodium
Chlorine
Oxygen

Answers

water

explanation:

water consists one oxygen atoms and two hidrogen of atom.

compound: have two or more atom

Hope this helps :)

If the pressure of a 2.00 L sample of gas is 50.0 kPa, what pressure does the gas exert if its volume is
decreased to 20.0 mL?
Which equation should you use?
V1 V2
T1 T2
P1V1 = P2V2
V1 V₂
N1 N2

Answers

Answer: P1V1 + P2V2

Explanation:

A chemistry student must write down in her lab notebook the concentration of a solution of sodium hydroxide. The concentration of a solution equals the mass of what's dissolved divided by the total volume of the solution. Here's how the student prepared the solution: The label on the graduated cylinder says: empty weight: She put some solid sodium hydroxide into the graduated cylinder and weighed it. With the sodium hydroxide added, the cylinder weighed . She added water to the graduated cylinder and dissolved the sodium hydroxide completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was . What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant digits.

Answers

Answer:

1.099 gmL¯¹ ≈ 1.1 gmL¯¹

Explanation:

From the question given above, the following were obtained:

Mass of empty cylinder = 9.5 g

Mass Cylinder + NaOH = 31.92 g

Volume of solution = 20.4 mL

Concentration of solution =?

Next, we shall determine the mass of sodium hydroxide, NaOH. This can be obtained as as illustrated below:

Mass of empty cylinder = 9.5 g

Mass Cylinder + NaOH = 31.92 g

Mass of NaOH =?

Mass of NaOH = (Mass Cylinder + NaOH) – (Mass of empty cylinder)

Mass of NaOH = 31.92 – 9.5

Mass of NaOH = 22.42 g

Finally, we shall determine concentration of the solution as follow:

Mass of NaOH = 22.42 g

Volume of solution = 20.4 mL

Concentration of solution =?

Concentration = mass /volume

Concentration of solution = 22.42 / 20.4

Concentration of solution = 1.099 gmL¯¹ ≈ 1.1 gmL¯¹

Therefore, the concentration of the solution is 1.1 gmL¯¹

Consider the development of atomic theory. The last piece of the atomic puzzle was the discovery of
A)
electrons in orbitals.
B)
the neutron in the nucleus.
C)
a dense, centrally located nucleus.
D)
the location of the electron cannot be determined.

Answers

Answer:

The answer will be B

Explanation:

Answer:

B.the neutron in the nucleus

Explanation:

Write the number in scientific nation form

Answers

Answer:

its already in scientific notation form however its ordinary or real form is -0.005682

Explanation:

scientific notation

when a number is expressed with some power of 10 multiplied by a number between 1 to 10 is called scientific notation


What is the mass number of an atom with 17 protons, 17 electrons, and 20 neutrons?

Answers

The mass number of this particular element is 37

An element with 17 protons will ALWAYS be chlorine.
The mass number is found by adding the element’s protons and neutrons.
protons+neutrons=mass number

Here is the math if needed,
17+20=37

Therefore the mass number is 37

I hope this helped!

A neutral atom has an equal number of positive and negative charges. If a neutral fluorine atom has 9 protons and 10 neutrons, how many electrons will it have?

Answers

Answer:

9 electrons.

Explanation:

Number of electrons = number of protons

= 9.

10. This is a neutral atom. What is this element

Answers

Answer:

I guess carbon

Explanation:

What is the solution for x in the equation? -3x + 7x − 8 = 34 + 9x − 2

Answers

Answer:-8

Explanation:

edmentum

The solution for the given linear equation can be solved by simplifying the equation. The value of x is obtained as - 8.

What is linear equations?

Linear equations are the equations which shows a linearity with a second expression which is similar to the first but having different mathematical operations and signs.

By solving linear equations we can solve for the unknown value of x. The value of x can be obtained by taking the whole expression to one side and which is having a constant value.

Given, - 3x + 7x - 8 = 34 + 9x -2.

          = 4x - 8 = 32 + 9x

          = 4x - 8 - 9x = 32

             -5x = 40

              x = - 40/5 = - 8.

Hence, solution of the given equation is  -8.

To find more on linear equations, refer here:

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Is one unlit match an example of a physical or chemical change, or a physical or chemical property?​

Answers

I believe it’s physical property because there is no chemical reaction to an unlit match‍♀️

What is the formula for 2-methylnonane

Answers

Answer:

C10H22

sorry if im wrong

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