Seudónimo Seudónimo

14-09-2018
Chemistry

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The atomic mass of an atom in atomic mass units is approximately equal to the number of which subatomic particles in the atom?
A. neutrons and protons
B. protons and electrons
C. electrons and neutrons
D. neutrons, protons, and electrons

Respuesta :

15-09-2018

A. Neutrons and Protons

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RomeliaThurston RomeliaThurston

03-09-2019

Answer: The correct answer is Option A.

Explanation:

Mass number is defined as the sum of number of protons and number of neutrons present in an atom. It is represented as A.

A = Mass number = Number of protons + Number of neutrons

For Example: Taking potassium element

Number of protons = 19

Number of neutrons = 20

Number of electrons = 19

Thus, the mass number of potassium element = 20 + 19 = 39

Hence, the correct answer is Option A.

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