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unit 1 session 2
| Question | Answer |
|---|---|
| nucleus | the center of an atom that has most of its mass |
| proton | a particle in the nucleurs of an atom that carries one unit of positive eletric charge |
| neutron | a particle in the nucleus of an atom has no electric charge |
| electron | a particle in the space outside the nucleus of an atom that carries one unit of negative electric charges |
| molecule | a particle that contains more than one atom joined together |
| mixture | a physical combination of two or more substances that are blended together without forming new substances |
| colloid | a type of misture in which particles of one materialare scattered through another and block the passage of light without settiling in |
| solution | a mixture of substances that are blended so complently that mixture looks the smae everywhere |
| alloy | a solution of a metal and at least one other solid which which is often also a metal |
| distillation | the process of separating the parts of a mixture by evaporation and condensation |
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