If an atom has 104 electrons, 157 neutrons, and 104 protons, what is its approximate atomic mass?

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21-09-2017
Chemistry

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If an atom has 104 electrons, 157 neutrons, and 104 protons, what is its approximate atomic mass?

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magistercollege magistercollege · Answer 1 · 2017-09-24T07:16:30+02:00

magistercollege magistercollege

24-09-2017

Atomic mass is number of protons + number of neutrons (disregard electrons in mass calculations). 104 + 157 = 261.

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tutorareej tutorareej · Answer 2 · 2021-12-01T06:50:09+01:00

The atomic mass of the atom with 104 protons and 157 neutrons has been 261 amu.

An atom has been consisted of the positively charged nucleus and the negatively charged electrons revolving around the nucleus. The nucleus has been consisted of neutrons and protons.

The transfer of electrons between the atoms impart charge to the atom and helps in the reactivity of the atom. The atomic mass in an atom has been the mass of the nucleus. It has been a constant quantity in an atom.

Since the atomic mass has been the mass of the nucleus:

Atomic mass = Neutrons + Protons

Atomic mass = 157 + 104

Atomic mass = 261 amu

The atomic mass of the atom with 104 protons and 157 neutrons has been 261 amu.

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