Which of the following is evidence of climate change?
A. Rise in global sea level.
B. Increasing salt levels in the Arctic ocean.
C. Burning fossil fuels releases sulfates.
D. A decrease in extinction rates.

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?