CH-132
Proton and nucleon numbers
Chemistry · Secondary 3 · Hard · Proton and nucleon numbers
An atom has the symbol . Which statement about atom X is correct?
- It has 9 neutrons and 10 protons.
- It has 9 protons and 9 neutrons.
- It has 9 electrons and 10 neutrons.
- It has 10 electrons and 9 neutrons.
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