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1. If the atomic number is 25, how many protons does it have? 2. If the atomic mass is 55 (rounded) and mass=protons+neutrons, how many neutrons does it have?
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1. If the atomic number is 25, how many protons does it have?

2. If the atomic mass is 55 (rounded) and mass=protons+neutrons, how many neutrons does it have?

User Gustav Karlsson
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4 votes
1. 25
2. 55-25 = 30

Hope this helps! :)
User Matteo Sganzetta
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