It is 79 - + 3 = 76 electrons.
<span>B. the He nucleus C.the He electrons D.the He quarks</span>
The answer is the second choice.
An educated guess is called estimation
A large volume of material will have a small amount of mass when the
material in question is gaseous or porous, and therefore has a lot of
space within it despite taking up a large amount of space overall.
