Atom -Multiple Choice Questions Quiz

Interactive MCQs on “Atom”:

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 smallest unit of an element that retains its chemical properties?

(a) Molecule
(b) Ion
(c) Electron
(d) Atom

Question 2: Who proposed the modern atomic theory and introduced the concept of the atom as an indivisible particle?

(a) Albert Einstein
(b) Niels Bohr
(c) John Dalton
(d) Marie Curie

Question 3: What are the three subatomic particles that make up an atom?

(a) Proton, neutron, and electron
(b) Neutron, electron, and photon
(c) Proton, photon, and positron
(d) Photon, neutron, and positron

Question 4: Which subatomic particle carries a positive charge?

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

Question 5: Which subatomic particle is electrically neutral (has no charge)?

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

Question 6: Which subatomic particle determines the chemical properties and reactivity of an atom?

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

Question 7: What is the total number of protons and neutrons in the nucleus of an atom called?

(a) Atomic mass
(b) Atomic number
(c) Isotope
(d) Valence electrons

Question 8: Which term refers to atoms of the same element with different numbers of neutrons, resulting in different atomic masses?

(a) Atomic number
(b) Atomic mass
(c) Isotope
(d) Valence electrons

Question 9: What is the atomic number of an element equal to?

(a) Number of protons in the nucleus
(b) Number of neutrons in the nucleus
(c) Number of electrons in the nucleus
(d) Number of valence electrons

Question 10: Which subatomic particle determines the stability and identity of an atom?

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