Answer:
a ground state electron jumps to a higher energy level
A. an ion
The atom gains a net electrical charge if the number of protons and electrons are not equal which makes it an ion.
Every organic molecules/compound contains carbon (c).
Some other very abundant are hydrogen, nitrogen, oxygen, phosphorus, and sulfur.
I learned this with the acronym CHNOPS.
C - Carbon
H - Hydrogen
N - Nitrogen
O - Oxygen
P - Phosphorus
S - Sulfur
Hope this helps!