SC-8
Atoms
Lower Sec Science · Secondary 1 · Hard · Atoms
Two atoms, A and B, have the following numbers of sub-atomic particles:
Atom A: 8 protons, 8 neutrons, 8 electrons
Atom B: 8 protons, 10 neutrons, 8 electrons
Which statement about A and B is correct?
Atom A: 8 protons, 8 neutrons, 8 electrons
Atom B: 8 protons, 10 neutrons, 8 electrons
Which statement about A and B is correct?
- A and B are atoms of the same element and both are electrically neutral.
- A and B are different elements because they have different neutrons.
- A and B have different chemical symbols but the same mass number.
- A is neutral but B is negatively charged.
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