When the following equation is balanced with the lowest whole number coefficients possible, what is the coefficient in front of zncl2?
al (s) + zncl2 (aq) --> zn (s) + alcl3 (aq)

the options are:
1
2
3
6

i think the correct answer is 1, but i'm not sure.

It's 3. There are two Cl in the reactants and 3 in the products, and they need to be balanced/equal. Only way to do that is add three on the left side, which will give you 6 Cl (3×2Cl) and then 2 on the other side, which will also give you 6 Cl (2×3Cl)

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom