Two atoms of a single element that differ in a number of neutrons are said to represent two distinct isotopes of that element.
Isotopes is an any of two or more forms of a chemical element with the same atomic number, but different numbers of neuron in a nucleus.
No, because a child under the age of 16 does not have the right to engage in such relationships and it's punishable by law if the relationship becomes intimate.
Do you have a pic? About the problem
5 atoms because you round 4.55 to 5
Protons and neutrons are in the nucleus (the center of an atom), but electrons are not.