Chemical ReactionsATI TEAS 7 cheat sheet

Types and balancing

9 key facts 5 practice questions Reviewed Oct 2026

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The Basics

Reactants → products
Mass is conserved — atoms are rearranged, never created or destroyed
Balance by changing coefficients, never subscripts

Types

Synthesis A + B → AB
Decomposition AB → A + B
Single replacement A + BC → AC + B
Double replacement AB + CD → AD + CB

Energy

Exothermic releases heat; endothermic absorbs it

Rate

Raised by higher temperature, concentration, surface area, or a catalyst

Key takeaway

Types and balancing

Before you read

Test yourself first: 5 questions

Question 1 of 5

A chemical reaction that releases heat is described as:

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