What is Newlands' Law of Octaves?

Why was Newlands' work criticised?

How did Mendeleev order the elements?

What did Mendeleev do, that Newlands' didn't do?

What do the group 1 elements consist of?

As you go down the group...

What type of bond do the alkali metals form?

Why are the alkali metals keen to lose their outer electron?

Alkali metals react with water to produce...

Alkali metals form...

What do the group 7 elements consist of?

As you go the group...

What type of bond do the halogens form?

What ion is formed when the halogens bond with metals?

What can a more reactive halogen do to a less reactive one?

Transition elements are good conductors of...

What are the physical properties of transition elements?

Compared to the alkali metals, the transition elements are...

Compared to the alkali metals, the transition elements are also...

How many ions does a transition element often have?

With soft water, you get...

With hard water, you get...

What makes water 'hard'?

What happens when hard water is heated?

What are calcium ions good for?

What causes temporary hard water?

What cause permanent hard water?

How is temporary hardness removed?

What happens when temporary hard water is boiled?

What is an ion exchange column?