SC-43
Atoms
Lower Sec Science · Secondary 1 · Hard · Atoms
An atom of element Z has 9 protons, 10 neutrons and 9 electrons. Which statement about this atom is correct?
- It has a nucleon number of 9 and is positively charged.
- It has a nucleon number of 19 and is electrically neutral.
- It has a nucleon number of 10 and is negatively charged.
- It has a nucleon number of 19 and is negatively charged.
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