Flashcards
Elements
Flashcards do conjunto (21)
- 1Define MatterAnything that occupies space and has mass
- 2Define massThe measure of the amount of matter than an object has
- 3Solid —> liquidMelting
- 4Liquid —> GasEvaporation
- 5Gas —> LiquidCondensation
- 6Liquid —> solidFreezing
- 7Describe how the particles move in a solid stateParticles of matter are strongly attracted to each other and are held close together
- 8Describe how the particles move in liquid stateForces of attraction are reduced, but the particles are still held closely together
- 9Describe how particles move in a gaseous stateThe distance between particles is large and forces of attraction are negligible
- 10Define densityMeasure of the mass per unit volume of a material (g/mL)
- 11Constant gravity on earth9.8m per second
- 12Define substanceMatter that has a uniform and definite composition (table sugar)
- 13Define moleculeThe simplest unit of a pure substance
- 14Define homogenous matterHas a constant/uniform composition, one phase. Homogenous mixture: where solid is dissolved in liquid (sugar in tea)
- 15Heterogenous matter/mixturesNon-uniform, variable composition, components easily separated, mixed/multiple phases, able to be separated by physical processes (fruit salad, soft drink, blood)
- 16What is a colloid?Mixtures where one substance is evenly dispersed throughout another colloid. Gas + Liquid: fog, deodorant. Solid + Gas: whipped cream. Liquid + Liquid: hand cream, “emulsion”
- 17Atomic number defines how many what is in the nucleus?Protons
- 18The mass number is the sum ofNumber of protons + number of neutrons in the nucleus
- 19Isotopes are atoms of the same element that have different numbers of...Neutrons
- 20Electronic configurationHow electrons are arranged around the nucleus of an atom
- 21Where are valence electrons located?The outside energy level. They determine the chemical properties of an element
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- FlashCards sobre Elements, criado por Rebecca A em 25-05-2018.
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- Rebecca A
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