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Description
Flashcards by jessie.knowles, updated more than 1 year ago
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Created by jessie.knowles
almost 11 years ago
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| Question | Answer |
| Base | Substances that can react with acids and neutralise them to make a salt and water. Usually metal oxides or hydroxides. |
| Acids | Substance with a pH less than 7. |
| Alkalis | Substances with a pH more than 7. Bases that dissolve in water. |
| Neutral Solutions | Solution with a pH of 7. |
| Anhydrous | Without water. |
| Hydrated | With water. |
| Exothermic | Heat is given out |
| Endothermic | Heat is taken in |
| Catalyst | A substance that speeds up a reaction without getting used up in the reaction or affecting the result. |
| Activation energy | Minimum amount of energy needed by particles to react. |
| Mole | The unit for amount of subtance. The molar mass is the relative formula mass of a substance in grams (g/mol). |
| Atom | The smallest particle of an element that can exist. |
| Molecule | Two or more atoms bonded together. Smallest unit of a chemical compound. |
| Compound | A thing that is composed of two or more separate elements. |
| Isotope | Two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei. |
| Nanoparticles | Really tiny particles that are 1-100 nanometres across. |
| Nanoscience | Using nanoparticles. |
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