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Descrição
FlashCards por Natasha Small, atualizado more than 1 year ago
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Criado por Natasha Small
aproximadamente 9 anos atrás
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| Questão | Responda |
| Name 3 metal properties ? | 1) Solid at room temperature 2) High melting points 3) Conducts heat |
| What is an element? | A pure substance made up of one type of atom. They are found on the periodic table. |
| What does malleability mean? | Can be bend and shaped |
| What does ductility mean? | Can be drawn into wire |
| What does sonorous mean? | Makes a sound when struck |
| Name 2 non-metals that have metal behaviour & explain what it is. | (Both are made out of carbon) * Diamond - a very hard material *Graphite - It conducts electricity |
| Name 3 properties of copper which are suitable for electric cable | - Conduct electricity - Ductile - Solid at room temperture |
| What does alloy mean? & give an example. | Alloy is a mixture of metals and/or non-metals. Steel is a alloy (Steel = Iron + Carbon) |
| What is aluminium used for (give 2 examples) and why. | Aircraft parts and drink cans because it has low density (light but strong) |
| What is sulfur used for ? | Thermal insulator (not easily shaped) |
| How can tarnishing occur? Give 2 examples | Its when the metal reacts with the air and water (and a thin layer of corrosion is formed) for exp.Iron rust and sliver dulls |
| What equation is formed when iron reacts with Oxygen? | iron + Oxygen (+ Hydrogen) --> Iron Oxide (Fe203) |
| Will all metal tarnish in the same way? Give 2 examples | No, because iron will rust and turn a orangy colour but copper will tarnish and turn blue and white |
| What is the general name for the effects on metals? | Corrosion |
| Name 5 ways of preventing rusting? | Oiling/Greasing , painting , galvanising(for exp. put a layer of zinc on iron so it can act as a sacrifice metal),heat treating |
| What is the chemical symbols for Hydrochloric acid? | HCl |
| What are the products of Magnesium + Hydrochloric acid --> ............ | Magnesium + Hydrochloric acid ----> Magnesium chloride + Hydrogen Mg + 2HCl ---> MgCl2 + H2 |
| What is the chemical equation for Magnesium + Oxygen ---> | 2Mg + 02 ---> 2Mg0 |
| What Group of Metals are most reactive? what type of metals are they and name 2 property | Group 1. are alkali metals with low melting points and are very soft. |
| Give 3 descriptions which happened with the Potassium(K) + Water | -Lilac Flame -UI turned purple -Effervescence |
| What is the general equation for alkali metals? | alkali metal + water ---> alkali metal hydroxide + hydrogen |
| What is the equation for Sodium and water? | Sodium + Water ---> Sodium Hydroxide + Hydrogen 2Na + 2H20 -->2NaOH + H2 |
| What is the chemical symbol for Hydroxide? | OH |
| Because group 1 metals are reactive, what do they have to be stored under? | They are stored under oil |
| Why is copper used for water pipes? | Because it is very unreactive |
| Give 2 reasons why group 1 metals are metals? | 1) Solid at room temperature 2) Shiny when cut |
| What is the most the most reactive metal in group 1 and what is the most reactive metal we saw. | -Francium (Fr) -Potassium (K) (We saw) |
| What changes when you get further down the periodic table? | It gets more reactive |
| What is produced when limewater turns cloudy? | Carbon Dioxide (CO2) |
| What is the chemical symbol for sulphuric acid? | H2SO4 |
| What are the products when Zinc and nitric acid reacts? | Zinc + nitric acid---> Zinc nitrate +Hydrogen Zn + HNO3 --->Zn(NO3)2+ H2 |
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