Chemistry y8
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Chemistry y8 - Details
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38 questions
| 🇬🇧 | 🇬🇧 |
| What are the three states of matter | Solid,liquid,gas |
| What is the change from solid to gas called | Sublimation |
| What is the change from gas to liquid called | Condensation |
| What is the change from liquid to solid called | Freezing ??? |
| You can tell something is a chemical change as there is a | Colour change Temperature change Odour change Formation of gas |
| What is a mixture made of | Three or more different elements and compounds that a NOT CHEMICALLY JOINED |
| What’s is an element | Made of only one type of atom |
| What is a compound made of | Two or more different elements chemically joined |
| What is a compound made of | Two or more different elements chemically joined |
| What is combustion | Rapid chemical combination of a substance with oxygen, involving the production of heat and light. |
| What is the air composed of | 78% nitrogen 21% oxygen ~1%argon, water vapour , co2 Traces of helium, neon , methane , nitrogen oxide |
| How to check for oxygen in the air | You put air in a syringe and copper pipe in between then another syringe the move the air back and forth if the copper oxides (heat it applied to it) there’s oxygen |
| What three things are needed for fire | Heat, oxygen, fuel |
| What is the carbon cycle | The carbon cycle is nature's way of reusing carbon atoms, which travel from the atmosphere into organisms in the Earth and then back into the atmosphere over and over again. Most carbon is stored in rocks and sediments, while the rest is stored in the ocean, atmosphere, and living organisms. |
| What happens to energy in a chemical reaction | Energy is conserved so the total amount of energy at the end is the same |
| What is an endothermic reaction | Takes non heat from the surroundings |
| What’s an exothermic reaction | Gives out heat to the surrounding |
| How are most common elements named | The first letter of their name |
| How are elements named if the first letter is taken | The first letter and the first voule |
| How is an element named is the first two letter are already used | First letter and first uncommon constnanent |
| Metals tend to be | Metals are good conductors of heat and electricity, and are malleable and ductile. Most of the metals are solids at room temperature, with a characteristic silvery shine (except for mercury, which is a liquid). |
| Some times elements are given symbols based of their | Old Latin name |
| Non metals tend to be | Nonmetals are (usually) poor conductors of heat and electricity, and are not malleable or ductile; many of the elemental nonmetals are gases at room temperature, while others are liquids and others are solids. |
| What are the property’s of acids | They have a low ph Can kill cells Taste sour Can be corrosive React with carbonates to give co2 contains hydrogen ions |
| Salts are not table salts but | Metal salts |
| Acid + bases makes | Metal salt + water |
| Reactive metal + acid makes | Metal salt + hydrogen |
| Acid + carbonates makes | Metal salt + water + carbon dioxide |
| Alkalis/bases have | High ph Taste bitter Often feel soapy Can be corrosive Alkalis are soulable bases |