RoseMarie Gallagher and Paul Ingram Solutions for Chapter: The Periodic Table, Exercise 5: Q

Describe any similarities you notice in the products that form when the halogens react with iron wool. 

Which type of bonding do halogens have?

What makes the halogens so reactive? 

Write a word equation for the reaction of bromine with potassium iodide. What do you expect to see? 

Explain why the following reaction occurs.

${\mathrm{Br}}_2 + 2\mathrm{KI} \to 2\mathrm{KBr} + {\mathrm{I}}_2$

The fifth element in Group $\mathrm{Vll}$ is called astatine. It is a very rare element. Do you expect it to be a gas, a liquid, or a solid? Give your reason.

The fifth element in Group $\mathrm{Vll}$ is called astatine. It is a very rare element. Do you expect it to be coloured or colourless?

The fifth element in Group $\mathrm{Vll}$ is called astatine. It is a very rare element. Do you expect it to be harmful or harmless?