Index
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élément chimique
Matching exercise
Match the items on the right to the items on the left.
Check
Sodium
???
3
20
5
4
6
11
Calcium
???
3
20
5
4
6
11
Lithium
???
3
20
5
4
6
11
Bore
???
3
20
5
4
6
11
Carbone
???
3
20
5
4
6
11
Béryllium
???
3
20
5
4
6
11
Check
OK
Index
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