I hope this picture helps
Answer:
This would be the hydride ion where H gains an electron from a metal such as Na
Explanation:
The answer is D they have 4 neutrons
(2) Mg, Ca, and Ba have the most similar chemical properties, and we know this because of their coexistence in the group alkali earth metals (group 2) on the periodic table.
Divide 74 by 2-37 :)
Two parents, each parent carries half of the chromosomes
