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Atomic Structure Atomic Number and Mass Number

1

Choose the best answer

The nucleus of ⁴⁵₂₁E contains:

Verified Answer & Explanation⌄

Correct Answer: B) 21 protons and 24 neutrons

Concept Explanation

Atomic number = 21, so protons = 21. Neutrons = 45 − 21 = 24.

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