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Lithium and Sodium are in the

same group making them similar :-)

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The inner shell is occupied first because the atoms like to be

close to the nucleus because it's positively charged.

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the inner shell is always occupied first because

it wants to be close to the neuleus because it

is attracted

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1) each atom has one more electron

than the one before!!!

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yes you can spot a pattern from the atoms going up one electron each time. The other pattern if the groups are grouped by number up to 8.

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the inner shell is used first because it is closest to the nucleolus

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Lithium and Sodium have similar properties because they have the same valence atoms

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The lowest energy level (the one found nearest

to the nucleus) can hold just two electrons.

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One pattern is, each element goes up by one electron each time x

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one of the patterns is that each element has one more proton and electron that the one before it

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The electrons go up one at a a time

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1. the pattern is that each element has one more electron than the one before it. 2. the inner shell is occupied first because it is closer to the nucleaus which has a positve charge and therefore attracts the electrons which have a negative charge.

3. Lithium and Sodium are similar because they are in the same group.

4. Aragon is stable because all the shells are filled up with the full capacity of electrons.

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The pattern is that each atom has one more electron than the last.

The inner shell is always occupied first because it is the closest to the nucleus.

Lithium and Sodium have similar properties because they are in the same group (1) in the periodic table.

Argon can be described as a stable atom because it has

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Lithium and sodium have similar properties because they are in the same group - group 1

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Argon is a stable atom because it has the maximum of electrons so it wont bond with anything

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Argon can be described as a stable atom because it has the maximum amount of electrons in each shell and as atoms like to have a full shell it is stable.

Lithium and Sodium are similar because they are in the same group (1).

Argon already has 8 in its outer shell so it doesn't need another so it doesn't react with anything, but Chlorine has seven so it needs another

Each element has one more atom than the one before

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Try this useful website if you are stuck! http://www.bbc.co.uk/schools/gcsebitesize/science/add_aqa_pre_2011/atomic/atomstrucrev5.shtml