Atomic Structure-Multiple Choice Questions Quiz

Interactive MCQs on “Atomic Structure”:

Solve the following 10 questions. Only one option is correct. Click on the “Submit” button when done. Click on the “embed” button to use this quiz on your website. Click on “WhatsApp” to share this quiz.

Question 1: What is the nucleus of an atom composed of?

(a) Electrons
(b) Protons and neutrons
(c) Neutrons and positrons
(d) Neutrons and electrons

Question 2: What is the atomic number of an element?

(a) The number of protons in its nucleus
(b) The number of neutrons in its nucleus
(c) The sum of protons and neutrons in its nucleus
(d) The number of electrons in its orbitals

Question 3: Which subatomic particle has a negative charge?

(a) Proton
(b) Neutron
(c) Positron
(d) Electron

Question 4: What is the total number of electrons that can occupy the first energy level of an atom?

(a) 2
(b) 4
(c) 8
(d) 18

Question 5: What is the term for atoms of the same element with different numbers of neutrons?

(a) Isomers
(b) Isotopes
(c) Ions
(d) Molecules

Question 6: Which quantum number describes the orientation of an electron's orbital in space?

(a) Principal quantum number (n)
(b) Angular momentum quantum number (l)
(c) Magnetic quantum number (ml)
(d) Spin quantum number (ms)

Question 7: What is the maximum number of electrons that can occupy the p orbital?

(a) 2
(b) 6
(c) 8
(d) 10

Question 8: What is the term for a region around the nucleus where electrons are likely to be found?

(a) Nucleus
(b) Electron cloud
(c) Proton shell
(d) Neutron zone

Question 9: What does the Pauli Exclusion Principle state?

(a) Electrons always occupy the lowest energy level.
(b) Electrons can exist in the same orbital with the same spin.
(c) No two electrons in an atom can have the same set of four quantum numbers.
(d) Electrons move in definite circular orbits around the nucleus.

Question 10: What is the term for the average mass of all naturally occurring isotopes of an element?

(a) Atomic mass unit (amu)
(b) Atomic number
(c) Atomic radius
(d) Atomic weight