Flashcards
Chemistry Unit 2
Cards in this deck (17)
- 1BaseSubstances that can react with acids and neutralise them to make a salt and water. Usually metal oxides or hydroxides.
- 2AcidsSubstance with a pH less than 7.
- 3AlkalisSubstances with a pH more than 7. Bases that dissolve in water.
- 4Neutral SolutionsSolution with a pH of 7.
- 5AnhydrousWithout water.
- 6HydratedWith water.
- 7ExothermicHeat is given out
- 8EndothermicHeat is taken in
- 9CatalystA substance that speeds up a reaction without getting used up in the reaction or affecting the result.
- 10Activation energyMinimum amount of energy needed by particles to react.
- 11MoleThe unit for amount of subtance. The molar mass is the relative formula mass of a substance in grams (g/mol).
- 12AtomThe smallest particle of an element that can exist.
- 13MoleculeTwo or more atoms bonded together. Smallest unit of a chemical compound.
- 14CompoundA thing that is composed of two or more separate elements.
- 15IsotopeTwo or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei.
- 16NanoparticlesReally tiny particles that are 1-100 nanometres across.
- 17NanoscienceUsing nanoparticles.