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11 Cards in this Set
- Front
- Back
- 3rd side (hint)
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structure of diamond |
has 4 covalent bonds, hardest natural substance, high melting point, can't conduct electricity, very rigid, giant structure |
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structure of graphite |
soft, slippery, it has 3 covalent bonds, can conduct electricity, weak forces of attraction are easily broken |
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how does electricity travel in graphite |
because it has 3 covalent bonds, they're free to move and carry electric |
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properties of metals |
high melting point, good conductor of electricity and heat, malleable, ductile , strong, dense |
malleable ( can be shaped) ductile (can be drawn into wires |
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structure of metals |
atoms in pure metal are tightly packed layers, it forms a regular lattice structure. metals have a giant structure. free electrons produce metal's properties. metals free to move cuz they're good conductors |
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drill heads are made from steel which is an alloy. |
alloys are harder than pure materials , cuz they have no space between. they have different sizes and so layer disorted |
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why we use pencil in chromatography paper |
because it doesn't separate the colours because it's graphite |
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what is a chromatography paper |
it's a paper that separate and identify components of mixtures, that mean that it can discover what's the unknown colour |
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advantages of chromatography gas |
it's more precise and faster |
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covalent bond |
shared pair of electrons |
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two kind of covalent substances |
simple molecular substances and giant covalent structures |
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