Group 7, 0 and 1

Question 1

What are the group 7 elements called?

Answer 1

Halogens

Question 2

Are halogens metals or non-metals?

Answer 2

Halogens are non-metals.

Question 3

Name the first 4 group 7 elements, starting at the top of the group.

Answer 3

Fluorine, Chlorine, Bromine, Iodine

Question 4

State the three trends in the group 7 elements as you go down the periodic table.

Answer 4

Decreased reactivity.
Higher melting/boiling points.
Higher atomic mass.

Question 5

Are halogens monoatomic or diatomic?

Answer 5

Halogens exist as diatomic molecules. This means they exist in pairs of atoms, like F2, or Cl2.

Question 6

Why do halogens become less reactive as you move down group 7 of the periodic table?

Answer 6

Going down the group there is:
- More Shielding/Shells
- Outer electron is less attracted to the nucleus
- Weaker attraction of outer electrons makes it hard to bond and react, and pull in another electron

THE FURTHER ELECTRONS ARE FROM THE NUCLEUS, THE MORE REACTIVE THE ELEMENT

Question 7

What type of bonds do halogens form with metals?

Answer 7

Halogens form ionic bonds with metals.

Question 8

What is a halogen displacement reaction?

Answer 8

A reaction is which a more reactive halogen displaces a less reactive one.

Question 9

Why are noble gases (group 0) inert?

Answer 9

Noble gases are inert because they already have a full outer-shell of electrons, so don’t need to gain or lose any electrons.

Question 10

What is the physical state of group 0 elements at room temperature?

Answer 10

gaseous at room temperature.

Question 11

State and explain the trend in the boiling points of noble gases as you move down group 0 of the periodic table.

Answer 11

The boiling points increase as you move down the group. This is because the atoms have more electrons, and so can form more intermolecular forces, which will require more energy to overcome.

Question 12

Are noble gases monoatomic or diatomic?

Answer 12

Nobel Gases are Monoatomic.

Question 13

What are transition metals?

Answer 13

Basic Metals we’d use day to day

Question 14

What are the typical features of a transition metal?

Answer 14

Transition metals have the same features as normal metals except they:

• Are good industrial Catalysts
• Can form multiple ions

Question 15

In terms of oxygen, oxidation is loss of electrons and……

Answer 15

Gain in Oxygen

Question 16

In terms of oxygen, reduction is……

Answer 16

Is loss of oxygen

Question 17

Rusting is also referred to as:

Answer 17

Oxidation

Question 18

Metal oxides less reactive than carbon can be made pure by…..

Answer 18

Bonding Carbon to the Metal oxide which makes carbon dioxide and a metal

Question 19

As we get further down group 1, the outer electron shell gets…..

Answer 19

FURTHER AWAY

Question 20

The Melting point of group 7 ____________ as you go down the group

Answer 20

Increases, as the electrostatic forces increase due to larger molecules

Question 21

Group 1s Reacted in water make a

Answer 21

Metal Hydroxide and Oxygen

Question 22

Explain why group 1 metals are stored under oil.

Answer 22

Prevents a reaction with air or water vapours

Question 23

Why do group 7s get less reactive down the group?

Answer 23

They have more shells which makes it harder to gain an electron to form a full outside shell because the forces from the nucleus are weaker

Question 24

Nobel Gases have a reactivity that increase __________ the group

Answer 24

Down

Question 25

What is the name of the type of chemical reaction that occurs when group 1 metals react with oxygen?

Answer 25

Oxidation

Question 26

Explain why noble gases are monatomic.

Answer 26

They have a full outside shell and don’t gain or lose

Question 27

The teacher weighed the glass tube and contents before the reaction and after the reaction.
Describe what happened to the mass of the glass tube and contents during the reaction.
Explain your answer.

Answer 27

Mass increases

Chlorine atoms are part of solid iron chloride

Question 28

Talking about Group 7 and 1, what rule always applies?

Answer 28

GROUP 1’S ALWAYS WANT TO LOSE AND GROUP 7S ALWAYS WANT TO GAIN, THEY DO THIS EASIER WHEN SHELLS ARE FURTHER AWAY

Question 29

Calcium is more reactive than magnesium.
Suggest an explanation for this in terms of the electronic structure of the two elements.

Answer 29

The nucleus has more electronic shielding in comparison to magnesium, making it easier to lose an outer electron