bmoreau5912 bmoreau5912
  • 22-09-2017
  • Chemistry
contestada

What is the mass number of an atom which contains 21 electrons, 21 protons, and 24 neutrons?

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HaniyaAhmed
HaniyaAhmed HaniyaAhmed
  • 23-09-2017
45 is the atomic mass of the atom. And the name is Scandium 
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Tringa0 Tringa0
  • 19-10-2021

The mass number of the atom is 45.

Given:

An atom contains 21 electrons, 21 protons, and 24 neutrons.

To find:

The mass number of an atom.

Solution:

Number of protons in atom = p = 21

Number of neutrons in atom = n = 24

Mass number of an atom = A

[tex]A = p + n \\\\A = 21 + 24 \\\\A = 45[/tex]

The mass number of the atom is 45.

Learn more about mass number here:

brainly.com/question/1371394?referrer=searchResults

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