SC-27
Atoms
Lower Sec Science · Secondary 1 · Medium · Atoms
An element has 17 protons and 18 neutrons in one of its atoms.
What are the proton number and mass number of this atom?
What are the proton number and mass number of this atom?
- Proton number 17, mass number 18
- Proton number 18, mass number 35
- Proton number 17, mass number 35
- Proton number 35, mass number 17
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