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Who was the first person to try and arrange elements?
How did Newland arrange the elements?
Why did Mendeleev leave gaps in the periodic table?
So new elements could fit into the periodic table.
How is the modern periodic table arranged?
What are the group 1 metals also known as?
The Alkali Metals.
How many electrons are on the outer shell of the group 1 elements?
As you go down group 1 what happens to the reactivity?
More reactive, lower melting and boiling points.
What are the group 7 elements also known as?
As you go down group 7 what happens to the reactivity?
Less reactive,higher melting and boiling points.
What type of bonds do halogens form?
name three advantages of transition metals?
- Good conductors.
- Very dense.
- Less reactive.
The Halogens are all Non-metals with Coloured Vapours. Match all the halogens with the coloured vapours.
Why is some water hard?
It contains Magnesium ions (Mg2+) and Calcium ions (Ca2+).
Give two advantages of hard water.
- Healthy for teeth and bones.
- People who drink hard water have less chance to get heart disease.
Name one way how to remove Magnesium ions (Mg2+) and Calcium ions (Ca2+).
Ion exchange column.
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