Hi, I have a question and I hope anyone could answer it:
(i) What is the common feature of the electronic configurations of the elements at the end of Period 2 and Period 3?
(ii) If an element is in Group 7 (or Group 7A) is it likely to be metallic or non-metallic character?
(iii) Supply the missing word from those in brackets.
If an element has one electron in its outermost energy level (shell) then it is likely to be (metallic/non-metallic)