From the following elements : 4Be; 9F; 19K; 20Ca (i) Select the element having one electron in the outermost shell. (ii) two elements of the same group.
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9f last outer most she'll one electron and 4be and 20 calcium belong same group
tkaeron:
19K belong to go. 1 and have 1e in outermost shell.
Be and Can belong to same go.
Answered by
3
9f has one electron in outermost shell and be and calcium from the same group
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