Group 2, or in the Alkaline Earth Metals section. This is due to the necessity to have a +2 charge to balance out or negate the -2 charge two Bromines carry.
Neutral implies that the amount of electrons = amount of protons
so for oxygen, protons = 8
isotopes have equal number of protons but differ in number of neutrons , so that affect the mass since :
protons + neutrons = atomic mass
Hope this helps
One way that in advance and biotechnology companies unintended consequence is that harm the environment would be D. Genes implanted into a species of plant can spread to other plants.
A picture. hope this helps at least a little.
