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gallium has an atomic number of 31 and a mass number of 70. which table shows the number of protons, neutrons, and electrons in a gallium ion with a +3 charge?

Respuesta :

RoseyAlarab

Answer:

the answer is 31 p+ and 28 e-

fichoh

The Number of proton, neutron and electron in gallium ion with a charge of +3 are 31, 39 and 28 respectively.

Given that :

  • Atomic number = 31
  • Mass number = 70

The relationship between Atomic number, mass number and number of neutron can be expressed thus :

Mass number = number of protons + number of neutrons

Atomic number = number of protons = 31

Hence,

70 = 31 + N

N = 70 - 31

N = 39

The number of electrons = number of proton ± charge

Since gallium has a charge of +3 ; it loses 3 electrons,

Hence,

Number of electrons = 31 - 3 = 28 electrons

Therefore, the Number of proton, neutron and electron are 31, 39 and 28 respectively.

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