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FlashCards por Usuário eliminado, atualizado more than 1 year ago
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Criado por Farha Idrees
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Copiado por Farha Idrees
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| Questão | Responda |
| What are the three sub-atomic particles of an atom? | 1) proton 2) neutron 3) electrons |
| a) relative mass b) location c) charge -of each sub atomic particle? | proton: a) 1 ; b) nucleus ; c) +1 neutron: a) 1 ; b) nucleus ; c) 0 electron: a) 0 ; b) shells ; c) -1 |
| Atoms contain an equal number of ____ and _____, so carry no overall _____. | Atoms contain an equal number of protons and electrons, so carry no overall charge. |
| atomic number = ... | atomic number = number of protons (=number of electrons) |
| mass number = ... | mass number = number of protons + neutrons |
| How do you work out the number of neutrons in an atom? | mass number - atomic number |
| Lead has an atomic number of 82, and a mass number of 207. Work out the number of: a) protons b) electrons c) neutrons | a) protons = atomic number = 82 b) electrons = atomic number = 82 c) neutrons = mass no. - atomic no. = 125 |
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