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John Ross Comes

Chapter 10 vocab

Element A pure substance that cannot be broken down into simpler substances by physical or chemical.
Atom The smallest particles of an element that retains the chemical identity of the element.
Compound A substance that contains two or more different elements chemically joined and has the same composition throughout.
Molecule A group of two or more atoms jointed by chemical bonds.
Pure substance Matter that cannot be separated into other types of matter by physical means.
Mixture Matter that contains a combination of different elements and/ or compound and can be separated by physical means.
Homogeneous mixture A mixture that is the same throughout.
Heterogeneous mixture A mixture in which different samples are not made up of the same proportions of matter.
Fahrenheit A temperature scale in which water freezes at 32 and boils at 212.
Celsius A temperature scale in which water freezes at 0 and boils at 100.
Thermal Energy Energy due to temperature.
Temperature A quantity that measures the kinetic energy per molecule due to random motion.
Thermometer Instrument that measures temperature.
Absolute zero Lowest possible temperature at which thermal energy is a close to zero as it can be (-273 C).
Kelvin scale Temperature scale that starts at absolute zero and has units the same as the Celsius scale.
Solid Phase of matter that holds its shape and does not flow.
Liquid Phase of matter that holds its volume, does not hold its shape and flows.
Gas Phases of matter that flows, does not hold it volume and can expand or contract to fill a container.
Plasma Phase of matter in which the mater is heated to such a high temperature that some of the atoms begin to break apart.
Intermolecular forces Forces between atoms or molecules in a substance that determines the phase of matter.
Melting point Temperature at which a substance changes from a solid to a liquid (melting) or liquid to solid (freezing).
Boiling Point Temperature at which a substance changes from a liquid to a gas (boiling) or from a gas to a liquid (condensation).
Created by: Bud Bud