Atomic Structure MCQs with Answers

Welcome to the Atomic Structure MCQs with Answers. In this post, we have shared Atomic Structure Online Test for different competitive exams. Find practice Atomic Structure Practice Questions with answers in Physics Tests exams here. Each question offers a chance to enhance your knowledge regarding Atomic Structure.

Atomic Structure Online Quiz

By presenting 3 options to choose from, Atomic Structure Quiz which cover a wide range of topics and levels of difficulty, making them adaptable to various learning objectives and preferences. You will have to read all the given answers of Atomic Structure Questions and Answers and click over the correct answer.

• Test Name: Atomic Structure MCQ Quiz Practice
• Type: Quiz Test
• Total Questions: 40
• Total Marks: 40
• Time: 40 minutes

Note: Answer of the questions will change randomly each time you start the test. Practice each quiz test at least 3 times if you want to secure High Marks. Once you are finished, click the View Results button. If any answer looks wrong to you in Quizzes. simply click on question and comment below that question. so that we can update the answer in the quiz section.

0

---

Atomic Structure

Please fill out the form before starting Quiz.

1 / 40

What determines the chemical properties of an element?

Number of neutrons

Electron configuration

Number of protons

2 / 40

What particles are found in the nucleus of an atom?

Electrons and protons

Neutrons and electrons

Protons and neutrons

3 / 40

What is the shape of an s orbital?

Dumbbell-shaped

Cloverleaf-shaped

Spherical

4 / 40

What are valence electrons?

Electrons in the outermost energy level

Electrons in the innermost energy level

Electrons in the nucleus

5 / 40

What does Hund's rule state?

No two electrons can have the same set of quantum numbers

Electrons occupy orbitals of equal energy singly first

Electrons fill the lowest energy orbitals first

6 / 40

What is the mass number of an element?

Sum of protons and neutrons

Sum of electrons and protons

Sum of electrons and neutrons

7 / 40

Who proposed the planetary model of the atom?

Ernest Rutherford

J.J. Thomson

Niels Bohr

8 / 40

What is a cation?

A neutral atom

A negatively charged ion

A positively charged ion

9 / 40

What is the charge of a neutron?

Neutral

Negative

Positive

10 / 40

What is the shape of a p orbital?

Spherical

Dumbbell-shaped

Cloverleaf-shaped

11 / 40

Who conducted the gold foil experiment?

J.J. Thomson

Ernest Rutherford

Niels Bohr

12 / 40

Who discovered the electron?

Niels Bohr

Ernest Rutherford

J.J. Thomson

13 / 40

How many f orbitals are there in an f sublevel?

3

5

7

14 / 40

How many electrons can the first energy level hold?

18

8

2

15 / 40

What is the maximum number of electrons that can occupy a single orbital?

2

3

1

16 / 40

What is the electron configuration of an atom?

The arrangement of atoms in a molecule

The arrangement of protons and neutrons in the nucleus

The distribution of electrons in an atom's orbitals

17 / 40

What is the charge of an electron?

Positive

Negative

Neutral

18 / 40

What does the Pauli exclusion principle state?

Electrons fill the lowest energy orbitals first

No two electrons can have the same set of quantum numbers

Electrons occupy orbitals of equal energy singly first

19 / 40

What is the relative mass of a proton compared to an electron?

Approximately 2000 times

Approximately 1836 times

Approximately 100 times

20 / 40

Which particle orbits the nucleus of an atom?

Proton

Neutron

Electron

21 / 40

How many electrons can the third energy level hold?

2

8

18

22 / 40

What is the atomic number of an element?

Number of neutrons

Number of protons

Number of electrons

23 / 40

Which rule states that electrons fill the lowest energy orbitals first?

Aufbau principle

Hund's rule

Pauli exclusion principle

24 / 40

What is the central part of an atom called?

Nucleus

Electron cloud

Shell

25 / 40

What is the charge of a proton?

Positive

Neutral

Negative

26 / 40

What model of the atom did J.J. Thomson propose?

Quantum mechanical model

Planetary model

Plum pudding model

27 / 40

What did Rutherford's gold foil experiment demonstrate?

The existence of isotopes

The presence of electrons

The existence of a small, dense nucleus

28 / 40

What is an ion?

An atom that has gained or lost neutrons

An atom that has gained or lost electrons

An atom that has gained or lost protons

29 / 40

How many d orbitals are there in a d sublevel?

5

7

3

30 / 40

What is the principal quantum number?

Describes the energy level of an electron

Describes the shape of an orbital

Describes the orientation of an orbital

31 / 40

What happens when an electron falls back to a lower energy level?

It gains mass

It absorbs energy

It releases energy

32 / 40

What is an orbital?

The nucleus of an atom

The path of an electron around the nucleus

A region of space where there is a high probability of finding an electron

33 / 40

How many electrons can the second energy level hold?

8

18

2

34 / 40

What is an anion?

A neutral atom

A negatively charged ion

A positively charged ion

35 / 40

What happens when an electron moves to a higher energy level?

It releases energy

It loses mass

It absorbs energy

36 / 40

What are the energy levels where electrons reside called?

Nuclei

Shells

Orbitals

37 / 40

How many p orbitals are there in a p sublevel?

5

1

3

38 / 40

What is an isotope?

Atoms with the same number of electrons but different numbers of protons

Atoms with the same number of neutrons but different numbers of protons

Atoms with the same number of protons but different numbers of neutrons

39 / 40

What is the ground state of an atom?

An excited state of the atom

The lowest energy state of the atom

A state where the atom has lost an electron

40 / 40

What does the Heisenberg uncertainty principle state?

It is impossible to know both the position and momentum of an electron simultaneously

Electrons occupy orbitals of equal energy singly first

Electrons fill the lowest energy orbitals first

0%

Restart quiz

Download Certificate of Quiz Atomic Structure

On the end of Quiz, you can download the certificate of the quiz if you got more than 70% marks. Add a certificate to your job application or social profile (like LinkedIn) and get more job offers.

Download Atomic Structure MCQs with Answers Free PDF

You can also download 100 Atomic Structure Questions with Answers free PDF from the link provided below. To Download file in PDF click on the arrow sign at the top right corner.

If you are interested to enhance your knowledge regarding  English, Chemistry, Computer, and Biology please click on the link of each category, you will be redirected to dedicated website for each category.