MCQs On Structure of Atom for NEET

Structure of Atom - Practice MCQs for NEET

The first chapter in Chemistry is the atomic structure, and it builds the foundation of understanding the subject. You should be well versed with the fundamentals of elements and molecules. In this regard, the atomic structure questions will further help in developing a strong understanding of the chapter. 

Herein, you will find MCQ on the atomic structure chapter so that you can test your knowledge. Besides, you will be prepared to face the exam papers if you are aware of similar questions beforehand. This will boost your confidence in cracking the exam with better grades as well.

MCQ On Chemistry - Atomic Structure

Every molecule consists of atoms, and everything we see around us is made up of molecules. Atoms further consist of smaller charged particles that are either positively or negatively charged.

The positively charged particles are called protons, and the negative ones are called electrons. An atom also has a neutral particle that is called a neutron. Chemical bonding of various atoms takes place due to the sharing of electrons. Herein, NEET chemistry MCQ on structure of atom deals with various questions that cover the fundamentals as well as the advanced concepts. 

  1. Who discovered electron?

  1. Rutherford.

  2. J. J. Thomson.

  3. Neils Bohr.

  4. James Chadwick.

  1. What is the formula for a mass number of an atom?

  1. Number of protons + number of electrons.

  2. Number of neutrons + number of electrons.

  3. Number of protons + number of neutrons.

  4. None of these.

  1. An atom has mass number 37 and atomic number 17. Find the number of protons.

  1. 21

  2. 22

  3. 17

  4. 20

  1. Which of the following is responsible for the mass of an atom?

  1. Only protons.

  2. Only neutrons.

  3. Neutrons and protons.

  4. Protons and electrons.

  1. Which of the following determines the atomic number of an atom?

  1. Number of electrons.

  2. Number of protons.

  3. Number of electrons and protons.

  4. Number of protons and neutrons.

  1. Nickel has atomic number 28. Choose the correct electronic configuration for Nickel.

  1. 1s2 2s2 2p4 3s2 3p8 3d10

  2. 1s2 2s2 2p6 3s2 3p6 3d8 4s2

  3. 1s2 2s2 2p4 3s2 3p6 4s2

  4. 1s2 2s2 3s2 3p8 3d10

  1. If both the K and L shells are full, what would be the atomic number of that element?

  1. 20

  2. 14

  3. 10

  4. 16

  1. Which of the following determines the chemical properties?

  1. Number of protons.

  2. Number of electrons.

  3. Number of neutrons.

  4. None of these.

  1. Atoms that have the same mass number and different atomic number are called?

  1. Isotopes.

  2. Isotones.

  3. Isobars.

  4. Isomers. 

  1. What happens to the atomic number during a chemical reaction?

  1. It increases.

  2. It changes.

  3. Remains the same.

  4. Changes alternatively.

  1. Who proposed the atomic theory?

  1. John Dalton.

  2. Robert Millikan.

  3. J. J. Thomson.

  4. Neils Bohr.

  1. The electronic configuration of atomic number 20 of an atom is which of the following?

  1. 2, 6, 6, 2

  2. 2, 8, 8, 2

  3. 2, 4, 6, 2

  4. 2, 4, 6, 2

  1. An atom differs from an ion with respect to which of the following?

  1. Number of protons.

  2. Nuclear charge.

  3. Number of electrons.

  4. Mass number.

  1. The maximum mass of an atom is concentrated in which of these?

  1. Nucleus.

  2. Neutrons.

  3. Protons.

  4. Electrons. 

  1. The isotopes of a neutral atom of an element differ in which of these?

  1. Physical properties.

  2. Chemical properties.

  3. Atomic number.

  4. Mass number.

  1. What is the sequence to label the subshells in an atom?

  1. S, p, d, f, g

  2. S, p, p, f, d

  3. S, s, p, p, d, f, g

  4. S, p, g, d, f

  1. The electronic configuration for oxygen is written as 1s2 2s2 2p4. Which rule will this configuration be violating?

  1. Aufbau’s principle.

  2. Hund’s rule.

  3. Pauli’s exclusion principle.

  4. None of the above.

  1. If an atom has four unpaired electrons. What is likely to be the total spin of the electron?

  1. 1

  2. 2.5

  3. 2

  4. 4

Answers: 1(b), 2(c), 3(c), 4(c), 5(b), 6(b), 7(c), 8(b), 9(a), 10(c), 11(b), 12(b), 13(c), 14(a), 15(c), 16(a), 17(d), 18(c)

Now you are aware of a considerable portion of NEET chemistry, these questions will help you in getting an overall idea of how the multiple-choice questions are framed. A crucial aspect in such questions is that you will often find the options to be similar or close to each other in terms of meaning.

Even the slightest misunderstanding can lead you to mark the answer wrong. Therefore, make sure you go through the structure of atom class 11 notes for NEET meticulously. You can not only develop an understanding but also avoid making silly mistakes in the exam.

Atomic structure is the fundamental chapter of studying Chemistry. It is thus vital for you to develop a stronghold on this chapter so that you ace the subject as a whole. The MCQ on atomic structure is meant to assess your understanding and grasp over the minute details included in the chapter.

Therefore, make sure you revise the chapter and atomic structure questions thoroughly before solving these. It will help you to judge your level of exam preparation. Also, list down the mistakes and learn from them to not repeat them in your actual exam.

FAQ (Frequently Asked Questions)

1. What is the Ideal Time to Prepare for NEET Chemistry?

Ans. There is no ideal time for preparation, but it is better to start as early as possible. Also, a consistent preparation schedule helps a lot to achieve high scores in minimum preparation time.

2. How Can I Plan My Schedule to Study Atomic Structure?

Ans. Take a sample test and find your weaker and stronger areas. Start your preparation accordingly. 

3. Are Diagrams of Atomic Structure Important?

Ans. Diagrams are important for understanding the electronic configurations of different atoms. Besides, you can also cross-check if your written configuration is correct. 

4. How Many Questions are Asked in NEET Chemistry?

Ans. An equal weightage is considered for all three subjects - Physics, Chemistry and Biology. Therefore, there is no fixed number of questions, though it remains somewhere around 25-30.