How many neutrons does element X have if its atomic number is 25 and its mass number is 92?

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11-04-2018
Biology

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How many neutrons does element X have if its atomic number is 25 and its mass number is 92?

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Plasma72 Plasma72 · Answer 1 · 2018-04-11T21:14:51+02:00

Plasma72 Plasma72

11-04-2018

Atomic mass is the sum of neutrons and protons, and atomic number is the number of protons.
Therefore, 92-25 = 67.

67 neutrons.

Sidenote:
Electrons are not considered in atomic mass since they weigh way too little

Answer Link

Plasma72 Plasma72 · Answer 2 · 2018-04-11T21:14:51+02:00

Plasma72 Plasma72

11-04-2018

Atomic mass is the sum of neutrons and protons, and atomic number is the number of protons.
Therefore, 92-25 = 67.

67 neutrons.

Sidenote:
Electrons are not considered in atomic mass since they weigh way too little

Answer Link