Which of the following is not a stressor that causes a change in equilibrium?
a. change in pressure
b. change in temperature
c. change in particle size
d. change in concentration

if two electrons have the same n, the same ℓ, and the same ml, then they are in the same orbital. the pauli exclusion principle states that no two identical fermions (a fancy word for electrons and other subatomic particles like electrons) may occupy the same quantum state in an atom simultaneously.

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.