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Chemical Reactions MS-PS1-5

NGSS

atom

the smallest particle of an element
atom Simple Definition

coefficient

a number placed in front of a symbol or formula in a chemical equation
coefficient Simple Definition

law of conservation of mass

states that mass cannot be created or destroyed in a chemical reaction
law of conservation of mass Simple Definition

model

a representation of an object or system
model Simple Definition

molecule

a group of atoms held together by bonds
molecule Simple Definition

product

a new substance formed by a chemical reaction
product Simple Definition

reactant

a substance that is changed in a chemical reaction
reactant Simple Definition

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