Why do elements in the same period of the periodic table have different
properties?

Answers

Answer 1

Elements in the same period have different properties because the number of valence electrons in their outermost shells differ. ... In a given column or group, all elements have the samenumber of electrons in their outermost shells. For example, in group 2, allelements have two electrons in their outermost shell.Sep 29, 2020

Related Questions

How many moles are in 4.3x10 23atoms of iron?

Answers

Answer:

[tex]\Large \boxed{\sf 0.714 \ moles}[/tex]

Explanation:

Avogadro's number can be used as a conversion factor from atoms to moles or moles to atoms.

[tex]\displaystyle \frac{4.3 \times 10^{23}}{6.022 \times 10^{23} } =0.714048[/tex]

Which element is named for Alfred Nobel, the scientist who established the nobel prizes?

Answers

Answer:

#102 nobelium

Explanation:

nobel + ium = nobelium

An element named after Alfred Nobel who established Nobel prizes is Nobelium .

What is an element?

It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.There are 118 elements which are confirmed to exist naturally or artificially.

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A chemist titrates 50.0 mL of a 0.1333 M benzoic acid (HCH,CO2) solution with 0.2560M NaOH solution at 25 °C. Calculate the pH at equivalence. The
PK, of benzoic acid is 4.20.
Round your answer to 2 decimal places.
Note for advanced students: you may assume the total volume of the solution equals the initial volume plus the volume of NaOH solution added.
DH-0
5
?

Answers

Oh okie gosh lol I don’t know what

Which of the following is the correct definition of "weathering"? *

The movement of rocks

The breakdown of rocks.

The dropping off of rocks

All of the above

Answers

I think that it would be the breakdown. Hope this helps!

the breakdown of rocks is the answer!

cells are not as large as this cube why summarize evidence to support your claim and explain your reasoning

Answers

Cells are very little so they can maximize their ratio of surface area to volume. Therefore making the cells not as large as the cube. The smaller the cell the higher the ratio

Boyle's Law states that when a sample of gas is compressed at a constant temperature, the pressure P and volume V satisfy the equation PV = C, where C is a constant. Suppose that at a certain instant the volume is 100 cm3, the pressure is 150 kPa, and the pressure is increasing at a rate of 30 kPa/min. At what rate is the volume decreasing at this instant?

Answers

Answer:

The volume is decreasing at a rate of 30 cm³/min.

Explanation:

From the question given above, pressure (P) and volume (V) are related by the following equation

PV = C

C => constant

If we make P the subject of the above, we shall have:

P = C/V

From the equation above (i.e P = C/V),

We can say that P is inversely proportional to V. This implies that as P is increasing, V will be decreasing and also, as P is decreasing, V will be increasing.

Considering the question given above, the pressure (P) is increasing at a rate of 30 kPa/min. Therefore, the volume will be decreasing at a rate of 30 cm³/min.

Which formula represents an ionic compound?
A) H20
B). KCI
C) CO2
D) CHE

Answers

Answer: B) KCl

Explanation: Potassium chloride, KCl , is an ionic compound formed by the electrostatic force of attraction that holds the potassium cations and the chlorine anions together. Potassium, K , is located in group 1 of the Periodic Table.

What is the chemical formula of sodium carbonate?

Answers

Answer:

Na2CO3 is the formula for sodium carbornate

Explain about Bose-Einstein condensate.

Answers

A Bose-Einstein condensate is a group of atoms cooled to within a hair of absolute zero. When they reach that temperature the atoms are hardly moving relative to each other; they have almost no free energy to do so. At that point, the atoms begin to clump together, and enter the same energy states.

Answer:

A Bose-Einstein condensate or BEC in simple words is a group of atoms cooled near absolute zero.

What is one way that minerals crystallize from materials dissolved in water?

Answers

Answer:

From solutions that evaporate

From hot water solutions when the solution cools

Explanation:

The substances that can form minerals can be dissolved in the water to form a solution. Solution can be described as as a mixture in which a solute is dissolved in a solvent. When a particular dissolved solute evaporates from the solution, crystals of minerals might form. The mineral halite was formed when seas evaporated over a period of time.

The minerals can also be formed when a hot water solution gets cooled.

How do computers play a role in meteorology? Select three options.

They use equations to predict future weather.
They collect data from weather stations.
They draw weather maps.
They measure temperature, humidity, and wind speed.
They send out microwaves to make radar measurements.

Answers

Answer:

a b c :]

Explanation:

Computers play a role in meteorology by equating to;

predict future weather,collect data and draw weather maps etc.

Computers in Meteorology

There options that best describe computers in Meteorology above are:

They use equations to predict future weather.They collect data from weather stations.They draw weather maps.

Answers

Answer:

.315mol CsI

Explanation:

CsI has a molar mass of 260 g/mol. This means that one mole of cesium iodide has a mass of 260 grams. We can use stoichiometry/dimensional analysis to figure out how many moles is equal to 82 grams.

[tex]82.0g CsI (\frac{1 mole}{260g} ) = .315mol CsI[/tex]

I WILL MARK AS BRAINLIEST IF YOU GIVE ME ANSWER
Which experiment would BEST investigate the effect temperature has on the volume of a gas?

A.
Measure the pressure of the air in a bicycle tire on a cold day.

B.
Stretch a balloon over the top of a beaker filled with baking soda and vinegar, then observe how the balloon changes volume as the reaction occurs.

C.
Measure the volume of a balloon filled with room temperature air; place the balloon in a freezer for an hour and measure its volume again.

D.
Inflate one balloon to a large volume and another balloon to a small volume. Measure the temperature of the air released from both balloons.

Answers

Answer:

Explanation:

Answer:

Explanation:

I think it is c because the tep. will change and the volume will change.

What is true about the position of any metal in the periodic table

Answers

Answer:

The metals are on the bottom left in the periodic table, and the nonmetals are at the top right. The semimetals lie along a diagonal line separating the metals and nonmetals. The elements are arranged in a periodic table, which is probably the single most important learning aid in chemistry.

Explanation:

im not sure if there was supposed to options to that question or not

When 136g of glycine are dissolved in of a certain mystery liquid , the freezing point of the solution is lower than the freezing point of pure . On the other hand, when of sodium chloride are dissolved in the same mass of , the freezing point of the solution is lower than the freezing point of pure . Calculate the van't Hoff factor for sodium chloride in . Be sure your answer has a unit symbol, if necessary, and round your answer to significant digits.

Answers

The given question is incomplete. The complete question is:

When 136 g of glycine are dissolved in 950 g of a certain mystery liquid X, the freezing point of the solution is 8.2C lower than the freezing point of pure X. On the other hand, when 136 g of sodium chloride are dissolved in the same mass of X, the freezing point of the solution is 20.0C lower than the freezing point of pure X. Calculate the van't Hoff factor for sodium chloride in X.

Answer: The vant hoff factor for sodium chloride in X is 1.9

Explanation:

Depression in freezing point is given by:

[tex]\Delta T_f=i\times K_f\times m[/tex]

[tex]\Delta T_f=T_f^0-T_f=8.2^0C[/tex] = Depression in freezing point

[tex]K_f[/tex] = freezing point constant

i = vant hoff factor = 1 ( for non electrolyte)

m= molality =[tex]\frac{136g\times 1000}{950g\times 75.07g/mol}=1.9[/tex]

[tex]8.2^0C=1\times K_f\times 1.9[/tex]

[tex]K_f=4.32^0C/m[/tex]

Now Depression in freezing point for sodium chloride is given by:

[tex]\Delta T_f=i\times K_f\times m[/tex]

[tex]\Delta T_f=20.0^0C[/tex] = Depression in freezing point

[tex]K_f[/tex] = freezing point constant

m= molality = [tex]\frac{136g\times 1000}{950g\times 58.5g/mol}=2.45[/tex]

[tex]20.0^0C=i\times 4.32^0C\times 2.45[/tex]

[tex]i=1.9[/tex]

Thus vant hoff factor for sodium chloride in X is 1.9

I need the answers to those 2 :) don’t explain just answer :D

Answers

Answer:

where is the question?

Explanation:

A 75 L container holds 62 moles of gas at a temperature of 215 0C. What is the pressure in atmospheres inside the container?

Answers

Answer:

Explanation: first change the temperature in degree celcius to kelvin by adding 273 to 215 which makes 488 then input value into the formula pv=nrt p*75=62*0.08206*488 then divide both sides by 75 you get 33

The pressure of gas in the atmosphere is equal to 33.1 atm.

What is the ideal gas equation?

The ideal gas law can be described as an equation of the state of a hypothetical ideal gas. This law states that the multiplication of the volume and pressure of one gram molecule of an ideal gas is equal to the product of the gas constant and absolute temperature.

The mathematical equation of the ideal gas law can be written as:

PV = nRT

where V is the volume, P is the pressure, n is the amount of substance and R is the gas constant.

Given the volume of the gas, V = 71 L

The number of moles of gas, n = 62

The temperature, T = 215 °C = 273 + 215 = 488 K

The value of the universal gas constant, R = 0.082 atm L/K mol

After substituting the all values in the ideal gas equation, we get:

P × 71 = 62 × 0.082 × 488

P = 33.1 atm

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9. The materials are carried in a cell by the _________________________. *

Answers

Answer:I dont know about this one

Explanation:

How many grams of CO2 are made from 10 moles of O2?

Answers

Answer:

100

Explanation:

1. How do aquatic animals obtain oxygen?
They weather sediment to release oxygen.
They filter the water for dissolved oxygen.
They breakdown seashells and other organic materials.
They separate oxygen from hydrogen in water molecules.
1

Answers

Answer:

the second one filter for dissolved

Explanation:

Answer:

They filter the water for dissolved oxygen.

Explanation:

just took test

Which bond occurs between two metal atoms?

Answers

Answer:

An ionic bond is a type of chemical bond formed through an electrostatic attraction between two oppositely charged ions. Ionic bonds are formed between a cation, which is usually a metal, and an anion, which is usually a nonmetal. A covalent bond involves a pair of electrons being shared between atoms.

Answer:

Hi! An ionic bond is a type of chemical bond formed through an electrostatic attraction between two oppositely charged ions. Ionic bonds are formed between a cation, which is usually a metal, and an anion, which is usually a nonmetal. A covalent bond involves a pair of electrons being shared between atoms.

If this helped drop a brainley plz ;)

Explanation:

Knowing that Boyle's Law is P1V1 = P2V2, How would we rearrange the formula if we needed to solve for P1?
A. P1 = V1 -P2
B. P1 = P2V2 - V1
C. P1 = P2V2/V1
D. P1= V1/V2

Answers

i think the answer would be D i’m sorry if it’s wrong

Answer:

your answer is C

Explanation:

because when u make P1 the subject formula then P2 V2 will be divided with V1

11. Write down the molecular formula of following compounds by
criss-cross
method
a. Ammonia
b. Methane
c. Common salt
d.Limestone
e.Hydrochleric acid
f.Caustic soda

Answers

Answer:

a. NH3

c. NaCl

e. HCl

What does electronegativity mean?

Answers

Answer:

Electronegativity refers to the ability of an atom to attract shared electrons in a covalent bond. The higher the value of the electronegativity, the more strongly that element attracts the shared electrons.

Your welcome

Which of the following apply to concentration?

Answers

Answer:Concentration of products can vary.

As more solute dissolves, more ions form; but the volume in which they are contained does not change.

Concentration of the solid phase does not change.

Explanation:

If we put 1g samples of all four of these into a hot oven, which would absorb the most heat in order to reach 100 degrees Celsius?

Answers

Answer:

Alluminum

I have to extend the answer: wedfojnwenlgeqoirhgkreqh

12. lithium + hydrochloric acid
lithium chloride + hydrogen
Balance

Answers

Answer:

Li + HCl = LiCl + H2 - Chemical Equation Balancer.

Explanation:

Knowing that Boyle's Law is PiV1 = P2V2, How would we rearrange the formula if we needed to solve for V2?
A. V2=P1V1/P2
B. V2= P1V1-P2
C. V2=P1/P2
D. V2= P V1 + P2

Answers

Answer:

A. V2=P1V1/P2

Explanation:

Robert Boyle law stated that pressure of a particular quantity of basis inversely varies with respect to the volume provided that the temperature is constant. It is expressed as

PiV1 = P2V2,

Where

V2= final volume

V1= initial volume

P1= initial pressure

P2= final pressure

Making V2 subject of formula we have

V2=P1V1/P2

Would an object with a higher specific heat absorb more or less energy when heated?

Answers

Answer:

less

Explanation:

the more heat it has, the less a given heat will affect it

Answer:

more heat

Explanation:

I need help!!!!!!! please

Answers

Answer:

A. bacteria

Explanation:

can i have brainlest?

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Why do elements in the same period of the periodic table have different properties?

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Why do elements in the same period of the periodic table have different
properties?