A by-product of photosynthesis that is not used by the plant, but rather released into the air, is .

I think is carbon dioxide!!

Explanation: ( i havent learned about photosynthesis in a long time :) )

hope i helped!! also have a good day!

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.

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.