Term
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Definition
| Are particles that make up all substances in universe. So small, can only see them with SEM. |
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Term
| What is indirect evidence? |
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Definition
| Evidence that does not involve direct observations. |
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Term
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Definition
| Nucleus and Electron shells. |
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Term
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Definition
| At the centre of each atom, made of protons and neutrons, neutrons are slightly heavier than protons, both are 1800 times heavier than electrons. Most mass of an atom is in a nucleus, Protons carry a positive charge, neutrons carry no charge (neutral), makes the nucleus a positive charge. |
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