Chemical Reactions Vocab

to act on or affect each other

• coexist
• collide
• interact
• react

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-5

a whole number that appears in front of a formula in a balanced chemical equation

• coefficient
• subscript
• element
• reactant

A number written slightly below and to the right of a chemical symbol that shows how many atoms of an element are in a molecule.

• Subscript
• Parenthesis

• Coefficient

• Superscript

A combination of two or more substances that are not chemically bonded together.

• Mixture
• Solution
• Blend
• Compound

speeds up a reaction

• catalyst
• facilitator
• accelerator
• enhancer

A reaction that releases energy in the form of heat

• Thermodynamic reaction
• Endothermic reaction
• Exothermic reaction
• Exergonic reaction

Tags

NGSS.HS-PS1-4

the rate at which reactants change into products over time

• reaction rate
• reaction speed
• conversion rate
• transformation pace

Tags

NGSS.HS-PS1-5

the moment when two atoms hit each other

• collision
• clash
• fusion
• impact

Tags

NGSS.MS-PS2-1

The spread of something over a given area. When molecules are closer together they are more likely to collide.

• Evaporation
• Concentration

• Diffusion
• Osmosis

The measurement of the outer surface of an object. Crushing or grinding solids increases this

• Weight
• Density
• Surface area
• Volume