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C2
AQA - Chemical Bonding
4
Chemistry
10th Grade
10/25/2011
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Term

 

Why do the elements in Group 1 react with the elements in Group 7?

 Definition
Because Group 1 elements can lose an electron in order to gain a full outer shell. This electron can be given to an atom from Group 7, which then also gains a full outer shell.
Term

 

What does the bottom number to the left of the element name in the Periodic Table tell you? (the relative mass)

 Definition

 

How many electrons are in the shells

 

EG. Na = 11

(2,8,1)
Term

 

 

Why do atoms react?

 Definition


They react to gain a full 'stable' arrangement of electrons, which includes sharing and transferring electrons to gain a full outer shell.
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