CH-139
Proton and nucleon numbers
Chemistry · Secondary 3 · Medium · Proton and nucleon numbers
An element X has proton number 12 and nucleon number 25.
How many neutrons and electrons are there in a neutral atom of X?
How many neutrons and electrons are there in a neutral atom of X?
- 13 neutrons and 12 electrons
- 12 neutrons and 13 electrons
- 25 neutrons and 12 electrons
- 13 neutrons and 25 electrons
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