How many neutrons does element X have if its atomic number is 39 and its mass number is 79?

Physics · College · Mon Jan 18 2021

Answered on

Given:

Atomic Number = 39

Mass Number = 79

Determine the number of neutrons of the element X

Solution:

In order to determine the number of neutrons of the element x, we simply needed to so use the formula for finding the number of neutrons.

Number of Protons = Number of Electrons = Atomic Number

Mass Number = Number of Protons + Number of Neutrons

Number of Neutrons = Mass Number - Number of Protons

Number of Neutrons = 79 - 39

Number of Neutrons = 40

Final answer:

The number of neutrons from element x is 40.

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