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18 Cards in this Set
- Front
- Back
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what are properties of non metals |
- Insulate heat - Cannot conduct electricity - Low density - Electrical insulator - Low melting points - Dull -Brittle |
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metal properties |
-Shiny - Can conduct electricity - High melting points - Malleable easy to mold - Sonorous - High density - Metals are really good heat conductors |
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Sodium + Chlorine |
Sodium chloride |
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oxygen after reaction is… |
oxide |
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what happens to nonmetals after chemical reactions? |
the ending changes to IDE e,g oxygen = oxide |
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what can you conclude about reactants and products when chemical reactions occur |
Reactants and products have very different properties |
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Define diatomic elements and give examples |
An element that naturally occurs as a molecule consisting of two atoms (these are GROUP SEVEN, HYDROGEN, OXYGEN, NITROGEN,CHLORINE ECT) |
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how do you test for oxygen |
insert a glowing splint into a test tube, if it relights that means there is oxygen in the test tube |
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what is the test for hydrogen |
insert a lit splint into a test tube and if there is a squeaky pop, there is hydrogen |
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how do you test for carbon dioxide |
carbon dioxide is tested by bubbling gas through lime water, if the lime water turns milky there is carbon dioxide |
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what is distillation |
distillation is a separation process commonly known to separate liquid mixtures. We can use it to separate ink and water, but not liquids with a similar boiling point |
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what is chromatography |
chromatography is another separation process used to speedster liquid mixtures. We can use it to separate mixtures of coloured pigments found in coloured inks |
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What is the Rf value equation |
Rf = distance travelled by fraction / Total distance travelled by solute |
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12 Cl 6 |
6 protons, 6 electrons and 6 neutrons |
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What are isotopes |
Isotopes are atoms of the same element with different top/mass numbers, so they have more/less neutrons. MUST HAVE SAME NUMBER OF PROTONS AND ELECTRONS |
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How do you calculate relative Atomic Mass? |
% of isotope 1 x mass if isotope 1 + % of isotope 2 x mass of isotope 2 / 100 |
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what are the rules for writing the electronic structure |
1. Start filling the inner shell first 2. The first shell can only contain up to 2 electrons 3. The shells after this can hold up to a maximum of 8 electrons |
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no |
no |
