Radience

Chemical Reactions MS-PS1-5

NGSS

the smallest particle of an element

Atom explained in an easy to understand way.

a number placed in front of a symbol or formula in a chemical equation

A number placed in front of a symbol or formula in a chemical equation

Coefficient

A number placed in front of a symbol or formula in a chemical equation. Coefficient. In chemistry, a coefficient tells you how many molecules or atoms of each substance are involved in a reaction.

states that mass cannot be created or destroyed in a chemical reaction

States that mass cannot be created or destroyed in a chemical reaction

Law of conservation of mass

States that mass cannot be created or destroyed in a chemical reaction. Law of Conservation of Mass. In a chemical reaction, the amount of stuff you start with is the same as the amount you end with, just rearranged.

a representation of an object or system

A representation of an object or system

Model

A representation of an object or system. Model. In Grade 7 NGSS, a model is a simplified way to show how something works or looks by using drawings, diagrams, or simulations.

a group of atoms held together by bonds

Molecule explained in an easy to understand way.

a new substance formed by a chemical reaction

Product explained in an easy to understand way.

a substance that is changed in a chemical reaction

Reactant explained in an easy to understand way.

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