CH-199
Proton and nucleon numbers
Chemistry · Secondary 3 · Easy · Proton and nucleon numbers
An element X has proton number 11 and nucleon number 23. How many neutrons are there in one atom of X?
A 11
B 12
C 23
D 34
A 11
B 12
C 23
D 34
- 11
- 12
- 23
- 34
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