Question

all the element in a group have same number of answer this question

Answer 1

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THE ELEMENT IN EACH GROUP HAVE THE SAME NUMBER OF ELECTRONS IN THE OUTER ORBITAL CALLED VALENCE ELECTRONS . THEY ARE THE ELECTRONS INVOLVED IN CHEMICAL BOND WITH OTHER ELEMENT . EVERY ELEMENT IN THE FIRST IN THE FIRST COLUMN [GROUP ONE] HAS ON ELECTRON IN THERI OUTER SHELL.

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