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Section 1

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chemical property

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Date created

Mar 1, 2020

Cards (26)

Section 1

(26 cards)

chemical property

Front

a characteristic of a substance that may be observed when it participates in a chemical reaction. Examples include flammability, toxicity, chemical stability, and heat of combustion

Back

physical change

Front

Changes affecting the form or shape, but not chemical composition. used to separate mixtures into their component compounds. (EX: change of state)

Back

density

Front

mass per unit volume of a substance. Mathematically, mass divided by volume. Also the degree of compactness of a substance

Back

chemical change

Front

occur when a substance combines with another to form a new substance

Back

law of conservation of mass

Front

states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time

Back

thermal energy

Front

Thermal energy is the internal energy of an object due to the kinetic energy of its atoms and/or molecules

Back

Atom

Front

The basic unit of an element

Back

weight

Front

force of gravity on the object

Back

solution

Front

mixture (usually liquid) in which one part (solute) is uniformly distributed within the other (the solvent)

Back

exothermic change

Front

any process which releases energy to its surroundings, usually in the form of heat

Back

element

Front

substances that cannot be chemically broken down into simpler substances. Each is distinguished by its atomic number, i.e. the number of protons in the nuclei of its atoms

Back

mixture

Front

the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspension and colloids

Back

physical property

Front

used to observe and describe matter. Include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity, and many others

Back

volume

Front

The amount of space that something takes up

Back

homogeneous mixture

Front

A mixture that has equal proportions of its components throughout any given sample (sometimes called a solution)

Back

mass

Front

a measure of the amount of matter in an object

Back

compound

Front

a pure substance that is composed of two or more separate elements that are chemically combined

Back

endothermic change

Front

any process which requires or absorbs energy from its surroundings, usually in the form of heat

Back

energy

Front

the ability to do work, cannot be created or destroyed

Back

heterogeneous mixture

Front

a non-uniform mixture of smaller parts, you can see the different parts

Back

molecule

Front

two or more atoms held together by chemical bonds

Back

matter

Front

anything that has mass and takes up space

Back

chemistry

Front

is the study of matter, its properties, how and why substances combine or separate to form other substances, and how substances interact with energy

Back

Chemical formula

Front

a set of chemical symbols showing the elements present in a compound and their relative proportions

Back

temperature

Front

objective measurement of how hot or cold an object is. It is a means of determining the internal energy contained within a given system

Back

chemical bond

Front

a strong force of attraction holding atoms together in a molecule or crystal, resulting from the sharing or transfer of electrons

Back