GK / GS · Chapter 2
Atomic Structure PYQs
Everything around you, from the chalk in your hand to the phone in your pocket, is made of atoms, and every atom is made of just three kinds of particles.
Dalton's Atomic Theory, Laws of Combination, Atoms and Molecules 8 PYQs
- Which of the following is a postulate of Dalton's atomic theory? I. All matter is made of very tiny particles called atoms, which participate in…SSC MTS 2026 · 11 Feb 2026
- Which law states that the masses of one element combining with a fixed mass of another in different compounds bear a simple whole-number ratio?DSSSB 2026 · 28 Sep 2026
- What are the identical particles that make up an element called?DSSSB 2026 · 01 Oct 2026
- What did Dalton say about the atoms of the same element?DSSSB 2026 · 05 Oct 2026
- Which law provides the strongest evidence that atoms combine in simple whole-number ratios?DSSSB 2026 · 11 Oct 2026
- According to Dalton's Atomic Theory, atoms of different elements differ primarily in which characteristic?DSSSB 2026 · 12 Oct 2026
- The discovery of the electron is credited to which of the following scientists?DSSSB 2026 · 13 Oct 2026
- Which postulate of Dalton's atomic theory reflects the law of conservation of mass?RRB NTPC 2025 · 12 Aug 2025
Subatomic Particles: Electron, Proton and Neutron 4 PYQs
- Which subatomic particle was discovered by J. Chadwick in 1932?SSC MTS 2026 · 11 Feb 2026
- Which scientist discovered the neutron in 1932?DSSSB 2026 · 08 Oct 2026
- Which scientist is credited with measuring the ratio of electrical charge to the mass of an electron using a cathode ray tube in 1897?DSSSB 2026 · 11 Oct 2026
- Who identified the electron in 1897 through experiments on cathode rays?DSSSB 2026 · 13 Oct 2026
Atomic Models: Thomson, Rutherford and Bohr 2 PYQs
- Which description corresponds to Thomson’s atomic model?DSSSB 2026 · 30 Sep 2026
- According to J.J. Thomson's Plum Pudding Model, how is the positive charge distributed within an atom?DSSSB 2026 · 09 Oct 2026
Atomic Number, Mass Number, Isotopes, Isobars and Isotones 6 PYQs
- Atoms A and B have atomic numbers 20 and 18 respectively and both have mass number 40. Which one of the following correctly describes the…Delhi Police 2026 · 20 Jan 2026
- Two atoms of the same element have atomic number 17 but different mass numbers 35 and 37. These two atoms are:Delhi Police 2026 · 16 Jan 2026
- Which principle allows us to separate isotopes using diffusion?Delhi Police 2026 · 09 Jan 2026
- An atom of element Z has atomic number 15 and mass number 31. Which option correctly gives the numbers of protons, neutrons and electrons in a…Delhi Police 2026 · 20 Jan 2026
- An atom of an element has atomic number 16 and mass number 32. How many neutrons are present in the nucleus of this atom?Delhi Police 2026 · 21 Jan 2026
- The number of protons in an atom of element X is 17. What is the atomic number of X?Delhi Police 2026 · 21 Jan 2026