Day 28 (chemistry)

Question 1

Give the colour of the element chlorine

Answer 1

Green

Question 2

Give the colour of iodine at room temperature

Answer 2

Grey

Question 3

What happens to the reactivity of the elements in Group 1 as you move down the group

Answer 3

It increases

Question 4

What happens to the reactivity of the elements in Group 7 as you move down the group?

Answer 4

It decreases

Question 5

How many atoms are found in the molecules of the halogens?

Answer 5

2

Question 6

Explain why potassium is more reactive than sodium

Answer 6

The outer electron in potassium is further from the nucleus and more easily removed

Question 7

What happens to the melting points of the halogens as you move down the group?

Answer 7

Melting points increase as you go down the group

Question 8

What happens to the melting points of group 1 metals as you move down the group?

Answer 8

Melting points decrease as you go down the group

Question 9

What would you expect to see when chlorine solution reacts with potassium iodide?

Answer 9

It would turn brown

Question 10

Complete the word equation:
Chlorine + Potassium Iodide –>

Answer 10

Chlorine + Potassium Iodide –> Potassium chloride + Iodine

Question 11

What would you expect to see when universal indicator is dipped into chlorine solution

Answer 11

The paper is bleached/turns white