Atomic Structure MCQ Class 11. We covered all the Atomic Structure MCQ Class 11 Questions JEE in this post for free so that you can practice well for the exam.
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Atomic Structure MCQ Class 11 for School Students
Which of the following is called sub atomic particle
1. Electron
2. Proton
3. Neutron
4. All above
Option 4 – All above
Which particle is located in nucleus
1. Proton
2. Neutron
3. (1) & (2)
4. Electron
Option 3 – (1) & (2)
Charge of electron
1. Negative
2. Positive
3. Neutral
4. None
Option 1 – Negative
Positive charge particle is
1. Electron
2. Proton
3. Neutron
4. All above
Option 2 – Proton
The positive Nuclear charge is neutralized by
1. Electrons
2. Protons
3. Neutrons
4. Other atom Nucleus
Option 1 – Electrons
Which particles revolve around the nucleus
1. Protons
2. Electrons
3. Neutrons
4. Positrons
Option 2 – Electrons
The first atomic model was proposed by
1. J.J. Thomson
2. Rutherford
3. Bohr
4. Sommerfield
Option 1 – J.J. Thomson
Who discovered electrons
1. Bohr
2. J.J. Thomson
3. Planck
4. Lande
Option 2 – J.J. Thomson
Water-melon model of an atom was Introduced by
1. Plank
2. Spin
3. Bohr
4.J.J. Thomson
Option 4 – J.J. Thomson
In which model the electrons were placed inside the nucleus
1. Water-melon
2. Planetary
3. Bohr’s
4. Sommer fields
Option 1 – Water-melon
Which of the following model could not account atomic spectra
1. Water-melon
2. Planetary
3. Bohr’s’
4. Sommer fields
Option 1 – Water-melon
Who proposed planetary model of an atom
1. J.J. Thomson
2. Bohr
3. Rutherford
4. Plank
Option 3 – Rutherford
Which of the following model is proposed based on a ray scattering experiment
1. Planetary
2. Water-melon
3. Bohr’s model
4. None
Option 1 – Planetary
According to planetary model or Nuclear model atoms are
1. Spherical in shape
2. Circular in shape
3. Rectangular in shape
4. Cylindrical in shape
Option 1 – Spherical in shape
The nucleus is made up of
1. Electrons and protons
2. Electrons and neutrons
3. Protons and neutrons
4. All above
Option 3 – Protons and neutrons
According to classical laws of physics a moving particle should lose
1. Mass
2. Velocity
3. Energy
4. None
Option 3 – Energy
If the electrons loses energy continuously the atomic spectra should consist of
1. Continuous bands
2. Discrete spectral lines
3. (1) and (2)
4. None
Option 1 – Continuous bands
Atomic Spectra is made of up
1. Continuous bands
2. Discrete spectral lines
3. (1) and (2)
4. None
Option 2 – Discrete spectral lines
The scientist who discovered neutrons is
1. J.J. Thomson
2. Goldstein
3. G.J. Stoney
4. Chadwick
Option 4 – Chadwick
Cathode rays are deflected towards …… pole in a magnetic field.
1. South pole
2. North pole
3. Both South & North
4. None
Option 2 – North pole
Atoms are made up of
1. Molecules
2. Elements
3. Ions
4. Sub atomic particles
Option 4 – Sub atomic particles
Cathode rays travel in straight line, they are
1. Positively charged particles
2. Negatively charged particles
3. Positively charged ions
4. Negatively charged ions
Option 2 – Negatively charged particles
Name the scientist who named cathode ray particle as an electron
1. G.J. Stoney
2. Niels Bohr
3. Schrodinger
4. Heisenberg
Option 1 – G.J. Stoney
According to one of the following theories, atom cannot be divided further
1. Raman
2. J.J. Thomson
3. Rutherford
4. Dalton
Option 4 – Dalton
Cathode rays were invented by one of the following scientists
1. Bohr
2. J.J. Thomson
3. Goldstein
4. James Chadwick
Option 3 – Goldstein
Atomic number (Z) is equal to the number of
1. neutrons
2. neutrinos
3. electrons
4. None of the above
Option 3 – electrons
Alpha particles could be defined as
1. protons removed from helium atom
2. electrons removed from lithium atom
3. electrons removed from helium atom
4. helium atom
Option 3 – electrons removed from helium atom
Entire mass of the atom is located in the
1. orbits surrounding the nucleus
2. centre of the atomic sphere
3. electrons only
4. none of the above
Option 2 – centre of the atomic sphere
Mass of the proton is ……. times greater than the electron.
1. 2350
2. 1837
3. 1950
4.2000
Option 2 – 1837
Matter is composed of smallest particles called as
1. molecules
2. particles
3. atoms
4. packages
Option 3 – atoms
Which one of the following has the highest frequency?
(a) Cosmic rays
(b) X-rays
(c) Radiowaves
(d) Microwaves
Option a – Cosmic rays
Which one of the following types of radiations has the smallest wavelength?
(a) Microwaves
(b) Infra-red
(c) Visible light
(d) X-rays
Option d – X-rays
Which one of the following pairs of rays is electromagnetic in nature?
(a) Beta rays and gamma rays
(b) Cathode rays and X-rays
(c) Alpha rays and beta rays
(d) X-rays and gamma rays
Option d – X-rays and gamma rays
Which of the following has the least penetrating power?
(a) Alpha particles
(b) Beta particles
(c) Gamma rays
(d) All have the same penetrating power
Option a – Alpha particles
When X-rays are produced
(a) heat is generated at the target.
(b) heat is absorbed in the target.
(c) the temperature of the target remains constant.
(d) brilliant light is seen at the target.
Option a – heat is generated at the target
What is the correct ascending order for frequencies of the following radiations? I. Visible II. X-rays III. Ultraviolet IV. Radio waves Codes
(a) I, III, II, IV
(b) III, II, IV, I
(c) IV, I, III, II
(d) IV, III, I, II
Option c – IV, I, III, II
The number of maximum electrons in the N shell is
(a) 2
(b) 8
(c) 18
(d) 32
Option d – 32
An atom has 7 electrons in its M-shell and contains 18 neutrons in its nucleus. What is its mass number?
(a) 25
(b) 27
(c) 35
(d) 43
Option c – 35
The number of angular and radial nodes for 4d orbital is respectively
(a) 2 and 1
(b) 1 and 2
(c) 3 and 1
(d) 4 and 0
Option a – 2 and 1
Two electrons in an orbital are differentiated by which of the following?
(a) Magnetic quantum number
(b) Spin quantum number
(c) Principal quantum number
(d) Azimuthal quantum number
Option b – Spin quantum number
Radioactivity was discovered by
(a) Rutherford
(b) Becquerel
(c) Bohr
(d) Madam Curie
Option b – Becquerel
Radioactivity is measured by
(a) a Hydrometer
(b) Geiger Counter
(c) a Seismometer
(d) Ammeter
Option b – Geiger Counter
Which one of the following is not radioactive?
(a) Astatine
(b) Francium
(c) Tritium
(d) Zirconium
Option d – Zirconium
Regarding the atom of a chemical element, the magnetic quantum number refers to
(a) orientation
(b) shape
(c) size
(d) spin
Option a – orientation
Which of the following element has one or two electrons in the K-shell only?
(a) Hydrogen
(b) Helium
(c) Neon
(d) Sulphur
Option b – Helium
The molecules of different compounds in which the total number of atoms and electrons are the same are called
(a) Isobars
(b) Isotopes
(c) Isotones
(d) Isosteres
Option d – Isosteres
Which of the following statements with regard to isotopes and isobars is/are correct? I. Isotopes have the same mass number. II. Isobars have the same atomic number. Select the correct answer using the codes given below.
(a) Only I
(b) Only II
(c) Both I and II
(d) Neither I nor II
Option d – Neither I nor II
In which one of the following is the valence electronic configuration, ns² np³ found?
(a) Carbon
(b) Oxygen
(c) Nitrogen
(d) Argon
Option c – Nitrogen
What are the maximum numbers of electrons that can be present in a shell represented by shell number ‘n’?
(a) 2n
(b) 2n²
(c) n
(d) n²
Option b – 2n²
What is the maximum number of electrons that the outermost shell can have?
(a) 2
(b) 6
(c) 8
(d) None of these
Option c – 8
Which of the following is the maximum number of electrons that can be present in an M-shell?
(a) 2
(b) 8
(c) 18
(d) 32
Option c – 18
Isotopes of an element have ………..
(a) same physical properties
(b) different chemical properties
(c) different numbers of neutrons
(d) different atomic number
Option c – different numbers of neutrons
Isobars have ……….
(a) same mass numbers but different atomic numbers.
(b) different mass numbers but the same atomic numbers.
(c) same mass and atomic numbers
(d) different mass and atomic numbers.
Option a – same mass numbers but different atomic numbers
The mass number is always equal to ……….
(a) a number of protons.
(b) number of neutrons
(c) sum of the number of protons and number of electrons
(d) sum of the number of protons and number of neutrons
Option d – sum of the number of protons and number of neutrons
Which one among the following is the most appropriate statement with respect to the atomic weight of an element?
(a) The atomic weight of an element is the sum total of the number of protons and neutrons present in the atom of an element.
(b) Unlike mass numbers, the atomic weight of an element can be a fraction.
(c) The atomic weight of an element is a whole number.
(d) The atomic weight of all the atoms in an element is the same.
Option b – Unlike mass numbers, the atomic weight of an element can be a fraction
The atoms of the elements having the same difference between mass number and atomic number are called ……….
(a) Isobar
(b) Isotopes
(c) Isotones
(d) No option is correct
Option c – Isotones
The atoms, in which the number of protons is the same but the number of neutrons is different, are known as
(a) Isobars
(b) Isomers
(c) Isotones
(d) Isotopes
Option d – Isotopes
The chemical properties of isotope
(a) must be the same.
(b) must be different.
(c) need not be the same.
(d) need not be different.
Option a – must be the same
Most of the mass of the atom can be found in
(a) electrons
(b) charges
(c) nucleus
(d) electron cloud
Option c – nucleus
The atomic mass of an element is equal to the sum of a number of
(a) electrons and protons only.
(b) protons and neutrons only.
(c) electrons and neutrons only.
(d) electrons, protons and neutrons.
Option b – protons and neutrons only
An atom of carbon has protons. Its mass number is 12. How many neutrons are present in an atom of carbon?
(a) 12
(b) 6
(c) 10
(d) 14
Option b – 6
Who developed the model of atomic structure?
(a) Bohr and Rutherford
(b) Volta
(c) Alfred Nobel
(d) Faraday
Option a – Bohr and Rutherford
Which one of the following statements is correct?
(a) Rutherford’s alpha particle. scattering experiment led to the discovery of electrons.
(b) JJ Thomson suggested that the nucleus of an atom contains protons.
(c) The atomic number of an element is the same as the number of protons in the nucleus of its atom.
(d) The mass number of an atom is equal to the number of electrons in its shells.
Option c – The atomic number of an element is the same as the number of protons in the nucleus of its atom
Consider the following statements. I. JJ Thomson was the first one to propose a model for the structure of an atom. II. Rutherford designed an experiment for the arrangement of electrons within an atom. In this experiment, fast-moving alpha particles were made to fall on a thin gold foil. Which of the statement(s) given above is/are correct?
(a) Only I
(b) Only II
(c) I and II
(d) None of these
Option c – I and II
Consider the following statements I. An atom consists of a positively charged sphere and the electrons are embedded in it. II. The negative and positive charges are equal in magnitude. So, the atom as a whole is electrically neutral. Which of the statements given above is/are correct about Thomson’s model of an atom?
(a) Only I
(b) Only II
(c) Both I and II
(d) None of these
Option c – Both I and II
Which one among the following transitions of electron of hydrogen atom emits radiation of the shortest wavelength?
(a) n = 2 to n = 1
(b) n=3 to n = 2
(c) n = 4 to n = 3
(d) n = 5 to n = 4
Option a – n = 2 to n = 1
Which of the following is responsible to rule out the existence of definite paths or trajectories of electrons?
(a) Pauli’s exclusion principle
(b) Heisenberg’s uncertainty principle
(c) Hund’s rule of maximum multiplicity
(d) Aufbau principle
Option b – Heisenberg’s uncertainty principle
Atomic Number is denoted by which alphabet?
(a) A
(b) N
(c) Z
(d) E
Option c – Z
In an atom, the neutron was discovered by
(A) J.J. Thomson
(B) Chadwick
(C) Rutherford
(D) Newton
Option b – Chadwick
Which of the following is not a subatomic particle?
(A) Neutron
(B) Proton
(C) Deuteron
(D) Electron
Option c – Deuteron
Which of the following pairs constitutes particle-antiparticle pair?
(A) Electron-Positron
(B) Proton-Neutron
(C) Photon-Electron
(D) Neutron-Neutrino
Option a – Electron-Positron
The alpha particle carries two positive charges. Its mass is very nearly equal to that of
(A) Two protons
(B) An atom of helium
(C) a Sum of masses of two positrons and two neutrons
(D) Two positrons each positron carries a single positive charge
Option b – An atom of helium
The Nucleus of Helium has
(A) Only one neutron
(B) Two protons
(C) Two protons and two neutrons
(D) One proton and two neutrons
Option c – Two protons and two neutrons
Which of the following is not a part of an atom?
(A) Electron
(B) Proton
(C) Neutron
(D) Photon
Option d – Photon
A single type of atom is found in
(A) Compounds of minerals
(B) a mixture of minerals
(C) Native elements
(D) None of the above
Option c – Native elements
Constituents of the atomic nucleus are
(A) Electron and proton
(B) Electron and neutron
(C) Proton and neutron
(D) Proton, neutron, and electron
Option c – Proton and neutron
Which of the following statement about molecular structure is correct?
(A) Neutrons and electrons are found inside the nucleus and protons revolve around the nucleus
(B) Electrons and proton are inside the nucleus and neutrons revolve around the nucleus
(C) Proton and neutron are inside the nucleus and electrons revolve around the nucleus
(D) Proton, neutron, and electron all are inside the nucleus
Option c – Proton and neutron are inside the nucleus and electrons revolve around the nucleus
The atomic nucleus was discovered by
(A) Rutherford
(B) Dalton
(C) Einstein
(D) Thomson
Option a – Rutherford
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