are ionic compounds formed from positive and negative ions electrostatically attracted to each other.

are reactive non-metallic elements in Group 7 of the periodic table which react with metals to form salts.

are the name of salts formed from halogens, e.g sodium chloride (NaCl).

element consists of two atoms of the same type, chemically bonded together.

Properties of Group 7

Combined science

Properties of Group 0

Properties of Group 1

Reactions of the halogens: including displacement practical

In the Chemical Analysis unit, pupils will build on their knowledge of the periodic table to explore various techniques for analysing substances and interpreting data.

In the Patterns in the Periodic Table unit, pupils learned about the arrangement of elements in the periodic table and the trends in properties of elements.

This unit explores how elements' reactions are related to electron arrangement and atomic number. It covers the properties of Groups 1, 7, and 0 and explains how these depend on outer electrons. It also predicts element reactivity and reactions based on their positions in the periodic table.

Groups of the periodic table

added to toothpaste to prevent tooth decay

added to tap water to kill harmful microbes present

Match the halogen to an example of one of its uses.

When a bromine atom forms a bromide ion, it gains an electron. Which is the correct ion?

Match the melting point to the correct halogen.

Calculate the relative molecular mass of a bromine molecule. 

Choose a halogen from the list which would displace chlorine from potassium chloride.

Bromine's outer electron shell is closer to the positively charged nucleus.

Outer electrons in bromine are more strongly attracted to the nucleus.

Bromine atoms gain electrons  more easily from all other elements.

Select the responses which explain why bromine is more reactive than iodine.

Match the following elements to their symbols.

Identify potassium bromide from the list of chemical formulae

What is the name given to Group 7 on the periodic table?

Which term is used to correctly describe an element that exists as a molecule composed of two atoms bonded together?

Which of these Group 7 elements will have the largest relative atomic mass?

Which Group 7 element has 35 protons, 35 electrons and 45 neutrons?

Exit Quiz

Match the halogen to an example of one of its uses.