Carbon has 6 electrons. When we put a second electron in the orbitals, Hund's rule states that the electrons should have parallel spins (remained unpaired) if
possible. Add the electrons to the energy level diagram of C.​

The correct name for n3-ion should be azide.

It's a

Noble gases is far right

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .