The Groups of The Periodic Table

As you move down group one, the the reactivity of the elements...

What colour is bromine?

Where are the elements with the highest mass found in the periodic table?

What does the command word "compare" mean?

What gas is produced when alkali metals react with water?

Which of these is a property of a metal?

Which one of these is a non-metal?

What does the command word "explain" mean?

As you move down group seven, what happens to the reactivity of the elements?

How could an experiment be improved to increase how accurate the results are?

When chlorine and iron are heated and react together, what is produced?

An investigation to determine which alkali metal is most reactive, which is a control variable?