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Section 1

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pure substance

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Chemistry Science

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Date created

Mar 14, 2020

Cards (14)

Section 1

(14 cards)

pure substance

Front

A sample of matter, either a single element or a single compound, that has definite chemical and physical properties

Back

Neils Bohr

Front

-said that electrons are in energy levels, the further an electron was from the nucleus, the higher its energy -developed the planetary model

Back

average atomic mass

Front

the weighted average of the atomic masses of the naturally occurring isotopes of an element

Back

electrons

Front

negatively charged subatomic particles

Back

Mixture

Front

A combination of two or more substances that are not chemically combined

Back

electron configuration notation

Front

numbers of electrons are represented by adding a superscript to the sub level designation

Back

atom

Front

Smallest particle of an element

Back

John Dalton

Front

English chemist and physicist who formulated atomic theory and the law of partial pressures

Back

Ernest Rutherford

Front

Gold foil experiment, discovered nucleus

Back

periodic table

Front

A table that shows the elements, their atomic number, symbol, and average atomic mass; elements with similar chemical properties are grouped together.

Back

compound

Front

A substance made up of atoms of two or more different elements joined by chemical bonds and CAN NOT be separated

Back

JJ Thomson

Front

Plum pudding model

Back

physical change

Front

A change in a substance that does not involve a change in the identity of the substance

Back

chemical change

Front

A change that occurs when one or more substances change into entirely new substances with different properties.

Back