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Protons: 3 Neutrons: 4 Electrons: 3 What is the mass number for the element above?
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User: Protons: 3 Neutrons: 4 Electrons: 3 What is the mass number for the element above?

Weegy: What do you need to know? Definitions?
Jess|Points 379|

User: mass numer

Weegy: 7 is the mass number of the element above. The mass number is the number of protons and neutrons. (3 protons + 4 neutrons)
Expert answered|arissa069|Points 151|

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Asked 12/20/2011 11:00:54 AM
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