3. Compared to the entire atom, the nucleus of the
atom is
A.
smaller and contains most of the atom's mass
B.
smaller and contains little of the atom's mass
C.
larger and contains most of the atom's mass
D. larger and contains little of the atom's mass

100%sorry if i’m wronghope this good luck: )

Well technically there are two correct answers b and d. but for you its probably b in general.good day sir/ma'am : ) (i know not gender)

3-isopentane; 3-methylbutane, and 1,2-methylpropane do not meet iupac rules, so they are wrong names.the only valid name onthe list is 2-methylbutane, which is the same isopentane.this is its formula:                   ch2                    |ch3 - ch - ch2 - ch3answer: 2-methylbutane