Imagine that you helped to discover a new element:
A= 302; Z = 119. How many protons, electrons, and
neutrons are in each atom of this element?

The number of proton, electron and neutron is 119, 119 and 183 respectively.

We were given an element to have A= 302 and Z= 1119. The mass number of an element is always more than the atomic number which means A is the

mass number which is 302 and atomic number is A which is 119.

Mass number (A) = 302

Atomic number (Z) = 119

Atomic number is the amount of proton in an element.

Proton = atomic number = 119

Since it's a neutral atom , then proton= electron

Electron = proton = 119

Mass number = proton + Neutron

Neutron = Mass number — proton

Neutron = 302 — 119

Neutron = 183

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Proton = 119

Electron = 119

Neutron = 183

Explanation:

Mass number (A) = 302

Atomic number (Z) = 119

Proton = atomic number = 119

Since there is no charge on the element, it means the element is neutral.

Therefore,

Electron = proton = 119

Mass number = proton + Neutron

Neutron = Mass number — proton

Neutron = 302 — 119

Neutron = 183