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| Question | Answer |
| _____ are the smallest particles of an element that can take part in chemical reactions. | Atoms. |
| Atoms are made of three types of subatomic particle. | Protons and Neutrons (In the nucleus) and electrons (In the shells/ energy levels) |
| The ______ is 20,000 times smaller than the atom its self | Nucleus |
| Subatomic particles have very, very small masses and electrical charges. its more convenient to describe their masses and charges compared to a proton. | These are called the particles relative mass and relative charge |
| Proton has a relative mass of.... and a relative charge of... | its relative mass is 1 and its relative charge is +1 |
| A neutron has a relative mass of.... and a relative charge of..... | Its relative mass is 1 and its relative charge is 0 |
| an electron has a relative mass of.... and a relative charge of.... | Its relative mass is Negligible ( 1/1840) and its relative charge is - 1 |
| No two elements have the same number of... | protons in their atoms |
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