Atoms are comprised of subatomic particles. Which of the following is a subatomic particle NOT found in the nucleus of an atom?

Explanation:

There are 3 major subatomic particles:

Proton

Neutron

Electron

Two (protons and neutrons) of the three particles are found in the nucleus of an atom. Electrons are not, they are surrounding the nucleus.

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally