Pls help thank you I would really appreciate it

Use examples from the article to explain one positive and one negative effect that chemistry has had on society

Lewis structure and molecular geometry for nh2cl

What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?