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Atomic Structure
Question | Answer |
---|---|
Who used alpha particles to find that an atom had a strong positive nucleus? | Ernest Rutherford |
Who predicted that atoms could not be divided any further? | John Dalton |
Who discovered the neutron? | Henry Mosely |
What is the definition of an Isotope? | Atoms of the same element with different numbers of neutrons. |
What is meant by atomic number? | The number of protons in the nucleus. |
What is the mass of an electron? | 1/1800 |
What is the definition of ion? | A positively or negatively charged atom. |