Atomic Structure Terminology MCQ’s

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This set of Materials Science Multiple Choice Questions & Answers (MCQs) focuses on “Atomic Structure Terminology”.

1. Atomic number of a species is the number of:
a) Neutrons
b) Protons
c) Valence electrons
d) Nucleons

2. Oxygen gas is denser than Carbon Dioxide gas?
a) True
b) False

3. Species with the same number of neutrons but the different number of protons are called:
a) Isotones
b) Isotopes
c) Isomers
d) Isobars

4. Which of the following has the least number of atoms?
a) One gram of Hydrogen gas
b) One gram of Helium gas
c) One gram-mole of Oxygen gas
d) One gram-mole of Chlorine gas

5. Which if the following is not an SI unit?
a) Kilogram
b) Mole
c) Atomic Mass Unit
d) Coulomb

6. Avogadro’s number of water molecules occupy 22.4 liters of space at 273 K.
a) True
b) False

7. Which of the following is not a pure form of matter?
a) Element
b) Compound
c) Solution
d) Both Compound and Solution

8. One unified atomic mass unit equals to ____________
a) 1/12 of molar mass of Carbon
b) 1/16 of atomic mass of Oxygen
c) 1/2 of the molecular mass of Hydrogen
d) all of the mentioned

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