If a neutral atom of oxygen (o) has 8 protons, 8 electrons and 7 neutrons, what is the mass number of this atom? a.8b.15c.16d.23

B. 15

Explanation:

Mass number is defined as the sum of number of protons and neutrons that are present in an atom.

Mass number = Number of protons + Number of neutrons

Atomic number is defined as the number of protons or number of electrons that are present in an atom.

Atomic number = Number of electrons = Number of protons

Given : number of protons = 8

number of electrons = 8

number of neutrons = 7

Hence, mass number = Number of protons + Number of neutrons = 8+ 7 = 15.

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the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl