Braineos2

sublimation

solid to gas

cc

burning gasoline chemical or physical change

chemical

flammability chemical or physical

compound

more than one element combined

cc

leaves changing colors chemical or physical change

lustrous malleable ductile conductors

4 properties of metal

endothermic

chemical reaction absorbs energy envir. feels COLD

suspension

mixture that has large particles that will settle out if left undisturbed

group

vertical columns on the PT sometimes called families

element and compound

2 pure substances

chemical

corrosion chemical or physical

cc

bubbling chemical or physical change

compressible

gas compressibility

homogeneous mixtures

solution is an example of

mendeleev

organized the PT based on atomic mass, left space for undiscovered elements

physical

volume chemical or physical

melting

solid to liquid

moseley

reorganized the period table based on atomic number

heterogeneous

suspensions and colloids

intensive

doesnt depend on he amount of a substance present (density, color)

-1

halogen has what charge

metalliod

properties of both metal and nonmetals (boron, silicon, arsenic)

physical property

characteristic that can be observed/ measured but does NOT change sample (mass,density)

chromatography

separates color

pc

grinding chalk into powder chemical or physical change

2

how many valence electrons does calcium have

halogen

group number 17

metal

elements found on the left side of the PT

physical

mass chemical or physical

period

horizontal rows on the period table

exothermic

chemical reaction releases energy. envir. feels HOT

pc

dissolving salt in water chemical or physical change

pc

melting a candle into wax chemical or physical change

alkali metal

group that has one valence electron

3 & 18

arong is found in what period and group

pc

melting ice chemical or physical change

accuracy

how close a measured value is to an accepted value

condensation

gas to liquid

extensive

depends on the amount of a substance present (volume, length)

precision

how close a series of measurements are to on a other

alkaline earth metal

group that contains Calcium and Magnesium

physical

density chemical or physical

cc

digesting food chemical or physical change

element

a single type of atom

mixture

made up of two or more pure substances

homogenous

also, known as a solution

physical

compressibility chemical or physical

crystallization

separation by evaporation

distillation

use boiling points to separate

insulators gases/ brittle solids

2 properties of nonmetals

filtration

separation by the use of a filter

physical

viscosity chemical or physical

chemical

reactivity chemical or physical

imcompressible

liquids compressibility

imcompressible

solids compressibility

matter

anything that takes up space

chemical property

Substances ability to combine with or change into a different substance (corrosion,reactivity)

color change gas evolution formation of a precipitate (solid from 2 liquids) energy change

list 4 indications that a chemical change occurred




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