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The mass number of an element can be easily approximated by adding together the number of _____ in an atom of that element.

A) protons and neutrons
B) energy levels
C) protons and electrons
D) neutrons and electrons
E) isotopes

User Nachospiu
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2 Answers

1 vote

Answer:

d

Step-by-step explanation:

User Yuriy Ivaskevych
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5 votes

Answer:

Its D

Step-by-step explanation:

User Haris Hasan
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