Gallium is an element with an atomic number of 31 and an atomic mass of 70 amu (rounded). With this information, identify the number of protons, neutrons, and electrons possessed by a gallium atom.

1.) The number of protons is the atomic number. The number of electrons is the same as the number of protons.
31 protons
31 electrons

2.) The number of neutrons is the atomic mass - atomic number. 70 - 31 = 39.
39 neutrons

3.) 31 protons
31 electrons
39 neutrons

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Tringa0 Tringa0 · Answer 2 · 2021-09-24T20:39:58+02:00

There are 31 protons, 39 neutrons, and 31 electrons possessed by a gallium atom.

Given:

The element gallium with an atomic number 31 and an atomic mass of 70 amu.

To find:

The number of protons, neutrons, and electrons in a gallium atom.

Solution:

The atomic number of gallium = 31

Atomic number = Number of protons in an atom of an element

Number of protons in gallium atom = 31

The atomic mass of gallium atom = 70 amu

Atomic mass = Number of protons+ Number of neutrons

70 = 31 + Number of neutrons

Number of neutrons in gallium atom = 70 - 31 = 39

A gallium atom is a neutral atom with an equal number of protons and electrons

Number of electrons in gallium atom = 31

There are 31 protons, 39 neutrons, and 31 electrons possessed by a gallium atom.

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