Index
=>
élément chimique
Matching exercise
Match the items on the right to the items on the left.
Check
sodium
???
19
4
20
11
3
12
calcium
???
19
4
20
11
3
12
potasium
???
19
4
20
11
3
12
litium
???
19
4
20
11
3
12
bérylium
???
19
4
20
11
3
12
magnésium
???
19
4
20
11
3
12
Check
OK
Index
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