← HESI A2 Chemistry Concepts

HESI A2 Nursing Entrance Exam Sample Test

Try 5 free practice questions with instant feedback. See how ready you are.

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Sample Questions

Question 1

What is the charge of a proton?

Answer: A proton carries a positive charge (+1). Protons are located in the nucleus of an atom.

Question 2

What is the atomic number of an element?

Answer: The atomic number is the number of protons in the nucleus of an atom. It uniquely identifies each element on the periodic table.

Question 3

What are isotopes?

Answer: Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons, giving them different mass numbers.

Question 4

What is the mass number of an atom?

Answer: The mass number is the total number of protons plus neutrons in the nucleus of an atom.

Question 5

Where are electrons located in an atom, and what is their charge?

Answer: Electrons are located in orbitals (electron clouds) surrounding the nucleus and carry a negative charge (-1).