Which statement explains why neon is a group 18 element?
(1) neon is a gas at stp.(2) neon has a low melting point.
(3) neon atoms have a stable valence electron configuration.
(4) neon atoms have two electrons in the first shell.

Astudent uses universal ph paper to find the ph of three solutions . solution a has a ph of 5 solution b has a ph of 11 and solution c has a ph of 7 identify which solution is acidic which solution is neutral and which solution is basic