Chapter 12- Group 7 elements

Question 1

Some examples of group 7 elements?

Answer 1

Chlorine. Bromine and iodine

Question 2

Describe the physical state of Chlorine?

Answer 2

It is a gas at room temperature and is pale green.

Question 3

Describe the physical state of Bromine?

Answer 3

It is a liquid at room temperature and is Red-brown.

Question 4

Describe the physical sate of Iodine?

Answer 4

It is a solid at room temperature and is black.

Question 5

What are they more commonly known as?

Answer 5

The halogens

Question 6

What is a halide?

A metal halide?

Answer 6

• A compound containing a halogen and another element.

- The other element is a metal.

Question 7

How and why does the reactivity change through the group?

Answer 7

Reactivity decreases down the group, because of the increasing size of the atoms.

Question 8

How many outer electrons do they have?

Answer 8

7, they want to gain 1 more.

Question 9

What is a displacement reaction?

Answer 9

When an element above the other in the ractivity series replaces it. The original element is produce on its own.

Cl+KBr= KCL+ Br &laquo_space; Cl displaces Br