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Helium (He) has an Atomic Number Z=2 and an atomic mass of 4.002602. It has eight...

Helium (He) has an Atomic Number Z=2 and an atomic mass of 4.002602. It has eight isotopes. One of them is 9He (atomic mass number 9).

a) How many protons are in a neutral 9He atom?

b)  How many nucleons (that is protons and neutrons) are in a neutral 9He atom?

c) How many electrons are in a neutral 9He atom?

d) How many neutrons are in a neutral 9He atom?

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genius_generous answered 2 years ago
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