Question

What is the mass number of an atom that contains 80 electrons, 80
protons, and 100 neutrons?

Answer 1

180

Step-by-step explanation:

proton = 80

electron = 80

neutron = 100

Note:- the atomic number of an element is the number of protons/electrons in the atomic shell

(protons = electrons)

Mass number = number of protons/electrons + number of neutrons

MN= NP+ NN

MN = 80 + 100

MN= 180

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