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You are reading an older version of this FlexBook® textbook: CK-12 Life Science Concepts For Middle School Go to the latest version.

1.9: Chemistry of Life

Difficulty Level: At Grade Created by: CK-12
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Vocabulary

atom

atom

Simplest and smallest particle of matter that still has chemical properties of the element.
atomic number

atomic number

Number of protons in an atom.
cell

cell

Basic unit of structure and function of a living organism; the basic unit of life.
chemical reaction

chemical reaction

Process that breaks or forms the bonds between atoms of molecules and compounds.
compound

compound

Combination of two or more elements.
electron

electron

Negatively charged particle that helps make up an atom.
element

element

Substance that cannot be broken down into simpler substances.
ion

ion

Charged atom; an atom that has gained or lost one or more electrons.
matter

matter

Anything that has mass and takes up space.
molecule

molecule

Combination of two or more atoms.
neutron

neutron

Uncharged particle that helps make up an atom.
periodic table

periodic table

Chart that organizes elements according to their unique characteristics.
products

products

End results of a chemical reaction.
proton

proton

Positively charged particle that helps make up an atom.
reactants

reactants

Molecules that come together to start a chemical reaction.

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Description

Difficulty Level:

At Grade

Grades:

7 , 8

Date Created:

Nov 29, 2012

Last Modified:

Apr 27, 2015
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