Question

An atom of hydrogen-2 contains one proton, one neutron, and one electron. Which particle(s) identify the atom as hydrogen?

the electron
the neutron
the proton
the proton and the neutron

Answer 1

E.) The proton and the neutron

Step-by-step 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 2

The correct options are: a. the electron; c. the proton

Step-by-step 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.