A student heats a sealed container of water and records temperature over time. During the period when the water is actively boiling, the temperature of the water remains constant even though heat is still being added. What accounts for this observation?

The added heat is being used to break intermolecular attractions rather than raise temperature.

The sealed container prevents heat from entering the water once boiling begins.

Boiling water reflects heat away from its surface, so no net energy is absorbed.

The thermometer is malfunctioning because temperature must always rise when heat is added.

An isotope of uranium is written as ²³⁸₉₂U. A different isotope of uranium has 143 neutrons. What is the mass number of this second isotope, and how does its chemical behavior compare to ²³⁸₉₂U?

Mass number 235; it behaves chemically the same as ²³⁸₉₂U because both isotopes have 92 protons and 92 electrons.

Mass number 235; it behaves chemically differently because it has fewer neutrons and therefore less mass.

Mass number 143; it behaves chemically the same because isotopes always have identical mass numbers.

Mass number 281; it behaves chemically differently because the total number of nuclear particles differs.

TEAS Chemistry Practice Questions — Free Sampler (2026)

PreNursePrep has 99 Chemistry questions for the ATI TEAS 7, each written to the current blueprint and each with a rationale explaining why the right answer is right. This section covers Scientific reasoning: experimental design, variables, hypotheses, evidence, Cardiovascular system and Respiratory system — 50 questions in 60 minutes on test day. The free sampler gives you 40 of them, timed and scored like the real exam, with no card and no sign-up.

99 Chemistry questions in the bank
50 on the real exam · 60 minutes
Rationale on every question

Try 40 questions free Practice by section

3 sample Chemistry questions

Drawn from the live ATI TEAS 7 bank. Answers and rationales open in the practice player.

Question 1States of matter, phase changes, properties
A student heats a sealed container of water and records temperature over time. During the period when the water is actively boiling, the temperature of the water remains constant even though heat is still being added. What accounts for this observation?
- AThe added heat is being used to break intermolecular attractions rather than raise temperature.
- BThe sealed container prevents heat from entering the water once boiling begins.
- CBoiling water reflects heat away from its surface, so no net energy is absorbed.
- DThe thermometer is malfunctioning because temperature must always rise when heat is added.
See the answer & rationale free →
Question 2Atomic structure and periodic table
An isotope of uranium is written as ²³⁸₉₂U. A different isotope of uranium has 143 neutrons. What is the mass number of this second isotope, and how does its chemical behavior compare to ²³⁸₉₂U?
- AMass number 235; it behaves chemically the same as ²³⁸₉₂U because both isotopes have 92 protons and 92 electrons.
- BMass number 235; it behaves chemically differently because it has fewer neutrons and therefore less mass.
- CMass number 143; it behaves chemically the same because isotopes always have identical mass numbers.
- DMass number 281; it behaves chemically differently because the total number of nuclear particles differs.
See the answer & rationale free →
Question 3Chemical bonds and reactions, balancing equations
Which type of chemical bond forms when one atom transfers electrons to another atom, resulting in the formation of oppositely charged ions?
- AIonic bond
- BCovalent bond
- CHydrogen bond
- DMetallic bond
See the answer & rationale free →

More ATI TEAS 7 practice

See where you stand on the ATI TEAS 7

Forty questions, timed and scored like the real thing. No card, no sign-up.

Try 40 questions free