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Section 1

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compound

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Chemistry Science

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7 years ago

Date created

Mar 1, 2020

Cards (30)

Section 1

(30 cards)

compound

Front

substance containing two or more DIFFERENT atoms that are chemically combined

Back

Pure substance examples

Front

salt, sugar, water and other compounds or molecules oxygen, hydrogen, copper and other elements

Back

solubility

Front

a measure of how well a solution can be dissolved in a solvent at a given temperature

Back

density

Front

the measurement of how much mass of a substance is contained in a given volume

Back

chemical change

Front

Connections between atoms are broken and new connections are made with different atoms resulting in new substances which possess different properties than the original substances.

Back

matter

Front

something that has mass which can exist in the form of a solid, liquid, gas or plasma

Back

mass

Front

amount of matter present

Back

acid

Front

in common usage is a substance that tastes sour, reacts with metals and carbonates, turns blue litmus paper red, and has a pH less than 7.0 in its standard state

Back

conservation of matter

Front

The mass of an closed system cannot be changed as a result of processes acting inside the system. A similar statement is that mass cannot be created/destroyed, although it may be rearranged in space, and changed into different types of particles. This implies that for any chemical process in a closed system, the mass of the reactants must equal the mass of the products.

Back

molecules

Front

particle containing two or more atoms that are chemically combined

Back

chemical reaction

Front

Interactions between substances (elements or compounds) in which there is a change in the chemical composition of the substances (elements or compounds) involved.

Back

solutions

Front

a mixture in which one or more kinds of matter are mixed evenly (dissolve) in another kind of matter

Back

Pure substance

Front

a substance with the same composition and physical properties throughout, may be elements, molecules and compounds.

Back

base

Front

a substance that is water soluble, bitter taste, turns red litmus paper blue and has a pH greater than 7.0

Back

pH

Front

A scale from 0 to 14 used to measure the acidity of an aqueous solution. It measures the concentration of hydrogen ions in the solution. pH values less than 7 are considered acidic, values greater than 7 are considered basic and values equal to 7 are neutral.

Back

insulator

Front

a substance that resists the flow of electric current or heat

Back

particles

Front

what matter is made up of. Can be atoms, molecules and compounds

Back

melting point

Front

temperature at which a substance changes from a solid to a liquid

Back

closed system

Front

this describes a system that may exchange energy with it's surroundings, buy not matter

Back

Chemical Properties

Front

flammability, reactivity and other properties that can only be observed when the substance reacts with another substance and forms a new substance

Back

physical properties

Front

can be observed without changing the composition of matter. Examples include texture, shape, size, color, volume, mass and weight

Back

property

Front

a characteristic of matter that can be observed or measured

Back

boiling point

Front

temperature at which a liquid changes into a gas

Back

open system

Front

in contrast with a closed system, this system is free to exchange energy and matter with its surroundings. It will not obey conservation principles

Back

conductor

Front

a material allowing the flow of heat or electricity

Back

Mixture Examples

Front

bucket of rocks all solutions chocolate milk

Back

physical change

Front

involves a change in physical properties, but not in chemical properties

Back

elements

Front

a substance that cannot be broken down into another substance by chemical or physical means

Back

particle model

Front

a scientific model used to explain the composition and behavior of matter. It is used to explain the difference between solids, liquids and gases

Back

mixtures

Front

two or more substances that are mixed together but not chemically combined

Back