Which of the following ions does not have the neon electron configuration?
A) S4+
B) Mg2+
C) O2-
D) Al3+
Question 2
What makes aerosols problematic?
A) They do not settle and stay in the atmosphere for a long time.
B) They act as micro chemical reaction sites.
C) They are the source of acid rain.
D) all of the above
E) only A and B