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8_murik_8 [283]
3 years ago
9

The mass of an atom is contained primarily in its _____. electron shell nucleus protons size

Biology
2 answers:
Anuta_ua [19.1K]3 years ago
7 0
Nucleus is the correct answer
GalinKa [24]3 years ago
3 0

Answer:

Nucleus

Explanation:

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