Question

Write the valencies of all the A groups

Answer 1

Answer:

All elements in group 1 have 1 valence electron so they have a valency of +1 as they will tend to give up 1 electron. This is the same for group 2 which will give up two electrons and group 3 which will give up 3 electron .

Explanation:

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Answer 2

Answer:

all elements in a group 1have 1 valence electrons

so they have a valency of +1 as they will tend to give up one electron. this is a same for group 2 which will give up two electron and group 3 which will give up three electron