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Section 1

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Compounds

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Chemistry Science

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Date created

Mar 1, 2020

Cards (32)

Section 1

(32 cards)

Compounds

Front

Compounds are pure substances that are composed of two or more atoms that are chemically combined. ● Compounds can only be changed into simpler substances called elements by chemical changes.

Back

mass of a proton and neutron

Front

proton mass=neutron mass

Back

atomic mass

Front

average sum of the number of the protons and the number of neutrons in the nucleus of the atom. (not a whole number)

Back

Physical Change

Front

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

Back

Chemical Formula

Front

Chemical formulas use element symbols from the periodic table and numerical subscripts to depict the name and number of atoms of each element in the compound

Back

Gas

Front

A state of matter with no definite shape or volume

Back

periods

Front

A horizontal row on the periodic table is called a period.

Back

subatomic particles

Front

protons, neutrons, and electrons

Back

Nonmetals

Front

Nonmetals, with the exception of Hydrogen (H), are located on the right side of the zigzag line on the periodic table

Back

Solid

Front

A form of matter that has a definite shape and volume

Back

Heterogeneous Mixture

Front

A mixture in which the composition is not uniform throughout

Back

periodic table

Front

organizes elements by increasing atomic number

Back

Reactants

Front

A starting material in a chemical reaction.

Back

Liquid

Front

A state of matter that has a definite volume but no definite shape.

Back

metalloids

Front

A zigzag line on the right side of the periodic table that separates the metals from the nonmetals. Metalloids are found along this zigzag line. Characteristics of both metals and nonmetals.

Back

Chemical Properties

Front

Characteristics of a substance that determine how it will react with other substances.

Back

Products

Front

Ending materials in a chemical reaction.

Back

Balanced Chemical Equation

Front

An equation with the same number of each kind of atom on the reactant side as on the product side.

Back

Law of Conservation of Mass

Front

States that the amount of matter does not change during a chemical reaction, only that the atoms are rearranged to form new substances.(matter can neither be created nor destroyed, but can be changed in form. )

Back

Mixtures

Front

Mixtures are composed of two or more different substances that retain their own individual properties and are combined physically (mixed together). ● Mixtures can be separated by physical means (filtration, sifting, or evaporation)

Back

Ionic Bonds

Front

Ionic bonds are formed when metals and nonmetals chemically bond to form a new substance

Back

atomic number

Front

equal to # of protons, whole number, never changes

Back

Where protons and neutrons are found.

Front

nucleus

Back

families

Front

Also called groups, are vertical columns of elements on the periodic table ● They are numbered 1-18. ● Elements in the same family have similar properties.

Back

Homogeneous Mixture

Front

A mixture that is the same throughout

Back

Subscripts

Front

Subscripts show how many of each kind of atom are in the compound. The subscript is written to the lower right of the element symbol

Back

Metals

Front

Metals are generally located on the left side of the zigzag line

Back

Chemical Change

Front

A change in matter that produces one or more new substances

Back

Physical Properties

Front

Characteristics of matter, such as color, odor, taste, boiling point, and melting point.

Back

Elements

Front

● Elements are pure substances that cannot be changed into simpler substances. ● Elements are composed of one kind of atom

Back

chemical symbol

Front

abbreviation for each element-always starts with a capital letter

Back

Covalent Bonds

Front

• Covalent bonds are formed when nonmetals bond with other nonmetals. • In covalent bonds, electrons are shared.

Back