Answer:
E.) The proton and the neutron
Explanation:
Not hydrogen. They have electrons. Electrons don't matter much and the mass of atom as you already know consists of protons and neutrons.
Answer:
The correct options are: a. the electron; c. the proton
Explanation:
Hydrogen is the first chemical element of the periodic table, that belongs to group 1 and period 1. It is an s-block element with atomic number 1.
There are three isotopes of hydrogen: protium (¹H), deuterium (²H) and tritium (³H).
Protium is the most abundant isotope, having one electron, one proton and zero neutron.
Whereas, deuterium or hydrogen-2, has one electron, one proton and one neutron.
Therefore, an atom having one electron and one proton is identified as hydrogen atom.
