An atom of uranium, whose atomic number is 92, transforms in nature to an atom of thorium plus a nucleus of helium, whose atomic number is 2. What is the atomic number of thorium?
O A 88
OB. 90
OC. 92
OD. 94

They are all decomposition reactions.

Cis the answer ur welcome if i get it wrong u don't have to me

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 .