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Creado por jessie.knowles
hace más de 10 años
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Pregunta | Respuesta |
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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