Which subatomic particle adds atomic mass to an atom but without adding charge? a. ion b. proton c. electron d. neutron

The correct answer is Option D.

Explanation:

There are 3 subatomic particles that are present in an atom. They are: protons, electrons and neutrons.

Atomic mass is defined as the sum of number of protons and neutrons that are present in an atom.

Atomic mass = Number of protons + Number of neutrons

Hence, the correct answer is neutrons.

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates