4410200
Descrição
FlashCards por grace.hanc, atualizado more than 1 year ago
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Criado por grace.hanc
quase 9 anos atrás
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| Questão | Responda |
| Atom | An ATOM is made up of a tiny central nucleus with electrons around it |
| Element | An ELEMENT is a substance that is made of only one sort of atom |
| Compound | When ELEMENTS react with each other; their atoms join together to form compounds |
| Compounds formed from reactions between non-metels consist of ______________ | MOLECULES |
| Alkali | A type of base that dissolves in water forming hydroxide ions, OH– (aq)ions. |
| Catalyst | A substance that increases the rate of a chemical reaction without being used up in the process. |
| Covalent bond | A bond formed by a shared pair of electrons |
| Difference between element and compound? | ELEMENT = one atom Compound = more than one atom |
| Displacement reaction | This is a method of extracting metals from their ores |
| Are metals a finite recourse? | Yes they are- they will run out |
| OILRIG stands for? | 0-xidation I-s L-oss of elextrons (gain of oxygen) R-edcution I-s G-ain of electrons (loss of oxygen) |
| Ore | An ore is a rock that contain enough of a metal to make its extraction economical. |
| What metal is normally used in smelting? | Copper |
| What is a transition metal? | The elements in the central block of the periodic table |
| Activation energy | The minimum energy needed to start a reaction |
| Catalyst | A substance that increases the rate of a chemical reaction. It is not used or changed in the reaction. |
| Displacement reaction | A reaction in which a more reactive element displaces a less reactive element from an aqueous solution of the latter’s ions. |
| Biodegradable | Materials that can be broken down by microorganisms |
| Biofuel | Fuel made from animal or plant products |
| Bioleaching | Process of extraction of metals from ores using microorganisms |
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