Question

CHOOSE
...........(1). which of the following is wrong about the periodic trend in going down a group? A. metallic character increase B. valence electron increase C. number of shell increases D. atomic size increases
............(2). element is which is most metallic
A. Na B. Ca C.Al D. Si
............(3). if the electron configuration of an element is 2, 8, 18, 6 the element is:
A. noble gas B. halogen C. chalcogen D. alkali metal

Answer 1

1) B is wrong

2) A- Na is correct

3) C - calogen is correct

hope it's helpful for you

thank you