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 are valence electrons?

Electrons in the innermost energy level

Electrons in the outermost energy level

Electrons in the nucleus

2 / 40

How many electrons can the first energy level hold?

8

2

18

3 / 40

What does the Heisenberg uncertainty principle state?

Electrons occupy orbitals of equal energy singly first

Electrons fill the lowest energy orbitals first

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

4 / 40

How many f orbitals are there in an f sublevel?

5

3

7

5 / 40

What is the principal quantum number?

Describes the orientation of an orbital

Describes the shape of an orbital

Describes the energy level of an electron

6 / 40

What is an isotope?

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

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

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

7 / 40

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

Approximately 2000 times

Approximately 1836 times

Approximately 100 times

8 / 40

Who discovered the electron?

Ernest Rutherford

Niels Bohr

J.J. Thomson

9 / 40

How many electrons can the second energy level hold?

18

8

2

10 / 40

Who conducted the gold foil experiment?

Ernest Rutherford

J.J. Thomson

Niels Bohr

11 / 40

How many d orbitals are there in a d sublevel?

7

3

5

12 / 40

What are the energy levels where electrons reside called?

Orbitals

Shells

Nuclei

13 / 40

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

It absorbs energy

It loses mass

It releases energy

14 / 40

What is the central part of an atom called?

Nucleus

Shell

Electron cloud

15 / 40

How many electrons can the third energy level hold?

8

2

18

16 / 40

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

It gains mass

It releases energy

It absorbs energy

17 / 40

What does Hund's rule state?

Electrons occupy orbitals of equal energy singly first

No two electrons can have the same set of quantum numbers

Electrons fill the lowest energy orbitals first

18 / 40

How many p orbitals are there in a p sublevel?

3

5

1

19 / 40

What determines the chemical properties of an element?

Number of neutrons

Number of protons

Electron configuration

20 / 40

What is a cation?

A negatively charged ion

A positively charged ion

A neutral atom

21 / 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

22 / 40

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

3

2

1

23 / 40

What is the charge of a proton?

Negative

Positive

Neutral

24 / 40

What is an anion?

A neutral atom

A negatively charged ion

A positively charged ion

25 / 40

What is the atomic number of an element?

Number of electrons

Number of neutrons

Number of protons

26 / 40

Which particle orbits the nucleus of an atom?

Proton

Neutron

Electron

27 / 40

What is the charge of a neutron?

Neutral

Negative

Positive

28 / 40

What particles are found in the nucleus of an atom?

Electrons and protons

Protons and neutrons

Neutrons and electrons

29 / 40

What is the shape of a p orbital?

Cloverleaf-shaped

Dumbbell-shaped

Spherical

30 / 40

What is the charge of an electron?

Negative

Neutral

Positive

31 / 40

What is the ground state of an atom?

The lowest energy state of the atom

An excited state of the atom

A state where the atom has lost an electron

32 / 40

What is the mass number of an element?

Sum of electrons and neutrons

Sum of protons and neutrons

Sum of electrons and protons

33 / 40

What did Rutherford's gold foil experiment demonstrate?

The existence of a small, dense nucleus

The existence of isotopes

The presence of electrons

34 / 40

What is the electron configuration of an atom?

The arrangement of protons and neutrons in the nucleus

The distribution of electrons in an atom's orbitals

The arrangement of atoms in a molecule

35 / 40

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

Planetary model

Plum pudding model

Quantum mechanical model

36 / 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

37 / 40

Who proposed the planetary model of the atom?

J.J. Thomson

Niels Bohr

Ernest Rutherford

38 / 40

What is the shape of an s orbital?

Cloverleaf-shaped

Spherical

Dumbbell-shaped

39 / 40

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

Pauli exclusion principle

Aufbau principle

Hund's rule

40 / 40

What is an orbital?

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

The path of an electron around the nucleus

The nucleus of an atom

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.