Flashcards
Chemistry
Flashcards do conjunto (22)
- 1Describe a solid-Particles are close together
-they can vibrate
-arranged in an orderly - 2Liquid-The attraction keeps them together but not firmly
-they have some freedom to move
-Some particles are touching - 3GasThe attraction between the particles is insufficient to keep them together
-They can move rapidly in all directions - 4Gas to liquidCONDENSING
- 5liquid to gasBOILING/EVAPORATING
- 6liquid to solidFREEZING
- 7solid to liquidMELTING
- 8solid to gas gas to solidSUBLIMING
- 9What is DiffusionDiffusion is the spreading out of one substance through another from a region of high concentration to a region of low concentration
- 10Why does diffusion happen?Diffusion is caused by the random movement of molecules.The molecules collide with other particles and bounce of in all directions.
- 11What is an element?A pure substance containing only one type of atom
- 12What is a compound?A pure substance containing atoms of more than one element that have been chemically bonded together.
- 13MixtureSeveral substances physically mixed together and can easily be separated.
- 14What is an atom?An atom is the smallest indivisible part of an element
- 15What is a molecule?A molecule is more than one atom bonded together
- 16What is an atom made of?Sub-atomic particles
- 17Atomic numberNumber of protons in an atom
- 18Mass numberThe number of protons and neutrons
- 19Neucleon numberThe number of protons and neutrons
- 20What are protons and neutrons known as?NEUCLEONS
- 21Where is the nucleus found?In the centre of an atom.
- 22How do you find the number of neutrons?Mass number - atomic number
Informações
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- FlashCards sobre Chemistry, criado por grayk em 23-12-2013.
- Criado por
- grayk
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