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15 Cards in this Set
- Front
- Back
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What is the relative mass of a proton, neutron and electron |
Proton - 1 Neutron - 1 Electron - very small |
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What is an alloy |
Metal made by combining two or more metallic elements. |
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What is an isotope |
Equal number of protons but different neutrons |
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What are two properties of ionic substances |
1.) High melting point 2.) Dissolve in water |
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How much atoms do nanoparticles contain |
Thousand |
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What is a polymer |
Large molecule, when smaller ones join together. |
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What is an atom? |
Smallest unit of matter. Consist of electrons,protons and neutrons. |
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What is an element? |
A substance that cannot be broken down. |
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What are group 7 elements? |
Known as halogens. All have seven electrons in their outer shell. |
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What is distillation? |
Purifying a liquid by a process of heating and cooling. |
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What is a compound? |
A molecule made up of atoms from different elements. |
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What is chromatography? |
Used to separate mixtures of coloured compounds. For example inks and dyes. |
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What are group 1 elements? |
Alkali metals. |
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What is the electronic structure? |
First shell 2 maximum. Second shell 8 maximum. Third shell 8 maximum. |
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History of the atom |
Dalton - idea of atoms Thomson - electron, plum pudding Ruherford - electrons orbit nucleus.
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