Chemistry
This topic covers atoms, elements, compounds, bonds, chemical reactions, acids, bases, pH, solutions, mixtures, properties of matter, and basic biochemistry.
How to study for the ATI TEAS
Build every answer around evidence, units, data, anatomy and physiology, scientific reasoning, grammar rules, and efficient timed elimination.
Core concepts
Concept 1
Chemistry questions test whether a TEAS candidate can apply core academic skills to nursing and allied-health readiness scenarios.
Exam cue: Identify whether the item is reading, math, science, or English and language usage.
Concept 2
The best answer usually follows the passage, data, rule, equation, scientific relationship, or grammar convention that is directly supported.
Exam cue: Find the controlling evidence: passage detail, equation, table, graph, anatomy relationship, experiment design, or sentence rule.
Concept 3
Eliminate answers that overinfer, ignore units, skip passage evidence, confuse scientific terms, or choose what sounds right without checking the rule.
Exam cue: Use process of elimination for extreme, unsupported, unit-inconsistent, or grammatically mismatched choices.
Risk pitfalls and guardrails
Choosing an answer that is true in general but not supported by the passage or data.
Guardrail: Avoid outside assumptions, unit mistakes, graph-scale misses, science term swaps, and sentences that sound polished but break grammar rules.
Losing points to unit conversion, graph scale, sign, decimal, or rounding errors.
Guardrail: Avoid outside assumptions, unit mistakes, graph-scale misses, science term swaps, and sentences that sound polished but break grammar rules.
Treating similar science or grammar terms as interchangeable.
Guardrail: Avoid outside assumptions, unit mistakes, graph-scale misses, science term swaps, and sentences that sound polished but break grammar rules.
Memory anchors
Atom
An atom is the basic unit of an element.
Element
An element contains one type of atom.
Compound
A compound contains chemically bonded elements.
Ionic Bond
An ionic bond forms through electron transfer and attraction between ions.
Covalent Bond
A covalent bond forms through shared electrons.
Chemical Reaction
A chemical reaction rearranges atoms into new substances.
Acid
An acid has pH below 7 and donates hydrogen ions.
Base
A base has pH above 7 and accepts hydrogen ions or releases hydroxide ions.
Solution
A solution is a homogeneous mixture of solute and solvent.
Concentration
Concentration describes amount of solute per amount of solution.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
The atomic number of an element equals the number of what?
Atoms of the same element with different numbers of neutrons are called what?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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