Atomic Structure: Interactive Quizzes and Practice Questions

Question 1

Which type of chemical bond involves the sharing of electron pairs?

Accepted Answer

Covalent bond

Answer

Ionic bond

Answer

Metallic bond

Answer

Hydrogen bond

Question 2

What type of hybridization does the carbon atom have in methane?

Accepted Answer

sp³

Answer

sp

Answer

sp²

Answer

sp³d

Question 3

Which species is a Lewis acid?

Accepted Answer

H⁺

Answer

NH₃

Answer

OH⁻

Answer

Na⁺

Question 4

What is the IUPAC name of Fe₂O₃?

Accepted Answer

Iron(III) oxide

Answer

Iron(II) oxide

Answer

Iron monoxide

Answer

Iron trioxide

Question 5

Which technique is used to determine the structure of a molecule by analyzing the diffraction of X-rays?

Accepted Answer

X-ray crystallography

Answer

Nuclear magnetic resonance (NMR)

Answer

Mass spectrometry

Answer

Infrared (IR) spectroscopy

Question 6

Who is credited with discovering the electron?

Accepted Answer

J.J. Thomson

Answer

Niels Bohr

Answer

Albert Einstein

Answer

Marie Curie

Question 7

Which subatomic particle carries a positive charge and resides in the nucleus?

Accepted Answer

Proton

Answer

Neutron

Answer

Electron

Answer

Alpha particle

Question 8

Which characteristic is NOT associated with noble gases?

Accepted Answer

Metallic luster

Answer

Low reactivity

Answer

Full valence electron shell

Answer

High ionization energy

Question 9

What is the correct Lewis structure of sulfur trioxide (SO3)?

Accepted Answer

O=S=O

Answer

O=S-O:

Answer

O-S-O

Answer

:O:S:O:

Question 10

Which factor does NOT influence the strength of an ionic bond?

Accepted Answer

Temperature

Answer

Charge of the ions

Answer

Size of the ions

Answer

Polarizability of the ions

Question 11

What hybridization is present on the nitrogen atom in ammonia (NH3)?

Accepted Answer

sp3

Answer

sp

Answer

sp2

Answer

sp3d

Question 12

Which of the following statements is NOT part of Dalton's atomic theory?

Accepted Answer

Atoms can be created or destroyed in chemical reactions.

Answer

Atoms are indivisible and cannot be subdivided further.

Answer

Atoms of the same element have identical masses and properties.

Answer

Atoms combine in simple, whole-number ratios to form compounds.

Question 13

Which of the following is NOT a fundamental subatomic particle?

Accepted Answer

Meson

Answer

Proton

Answer

Neutron

Answer

Electron

Question 14

Which atomic model proposed a small, dense, positively charged nucleus surrounded by electrons orbiting in specific energy levels?

Accepted Answer

Bohr model

Answer

Rutherford model

Answer

Thomson model

Answer

Quantum mechanical model

Question 15

Which of the following orbitals has the highest energy?

Accepted Answer

4d

Answer

1s

Answer

2s

Answer

3p

Question 16

Which of the following elements has the highest electronegativity?

Accepted Answer

Fluorine

Answer

Chlorine

Answer

Bromine

Answer

Iodine

Question 17

Which type of chemical bond is formed by the complete transfer of electrons from one atom to another?

Accepted Answer

Ionic bond

Answer

Covalent bond

Answer

Metallic bond

Answer

Hydrogen bond

Question 18

Which of the following molecules has the highest polarizability?

Accepted Answer

H₂O

Answer

CH₄

Answer

NH₃

Answer

HF

Question 19

Which of the following intermolecular forces is responsible for the high boiling point of water?

Accepted Answer

Hydrogen bonding

Answer

Dipole-dipole interactions

Answer

London dispersion forces

Answer

Ion-dipole interactions

Question 20

Which of the following Lewis structures correctly represents the bonding in carbon dioxide (CO₂)?

Accepted Answer

O=C=O

Answer

O-C-O

Answer

O::C::O

Answer

C≡O-O

Question 21

According to Rutherford's atomic model, where is the majority of an atom's mass located?

Accepted Answer

Nucleus

Answer

Neutron cloud

Answer

Proton cloud

Answer

Electron cloud

Question 22

Which periodic trend consistently increases as you move down a group in the periodic table?

Accepted Answer

Atomic radius

Answer

Ionization energy

Answer

Electronegativity

Answer

Electron affinity

Question 23

What type of chemical bond forms due to the electrostatic attraction between oppositely charged ions?

Accepted Answer

Ionic bond

Answer

Hydrogen bond

Answer

Covalent bond

Answer

Metallic bond

Question 24

Which of the following is a noble gas element?

Accepted Answer

Neon (Ne)

Answer

Sodium (Na)

Answer

Magnesium (Mg)

Answer

Aluminum (Al)

Question 25

What is the atomic number of an atom containing 20 protons and 22 neutrons?

Accepted Answer

20

Answer

22

Answer

18

Answer

40