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Structure of Atom NEET Questions. We covered all the Structure of Atom NEET Questions in this post for free so that you can practice well for the exam.
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MCQ on Structure of Atom for NEET Students
Which expression indicates the maximum number of electrons that can occupy a shell?
(a) n²
(b) 2n²
(c) 3n²
(d) 4n²
Option b – 2n²
Which component is not required in a nuclear fission plant?
(a) Moderator
(b) Coolant
(c) Particle accelerator
(d) Control mechanism
Option c – Particle accelerator
The electronic configuration ending in ns²np³ is typical of which element?
(a) Carbon
(b) Oxygen
(c) Nitrogen
(d) Argon
Option c – Nitrogen
Which of the following statements about atoms is incorrect?
(a) Atoms combine to create molecules
(b) Molecules and ions are made from atoms
(c) Atoms are always electrically neutral
(d) Visible matter is formed when atoms group together in vast numbers
Option d – Visible matter is formed when atoms group together in vast numbers
Which of these definitions is/are correctly matched? 1. Isotopes: Same atomic number, different mass numbers 2. Isobars: Same neutron count, different atomic numbers 3. Isotones: Same mass number, different atomic numbers
(a) 1, 2, and 3
(b) 1 only
(c) 1 and 2 only
(d) 2 only
Option b – 1 only
A nitrogen oxide with a molar mass of 30 contains how many electrons per molecule?
(a) 14
(b) 15
(c) 22
(d) 23
Option b – 15
What does the nucleus of a singly charged carbon ion contain?
(a) 6 protons and 6 neutrons
(b) 5 protons and 6 neutrons
(c) 6 protons, 6 neutrons, and 6 electrons
(d) 12 protons, 6 neutrons, and 6 electrons
Option a – 6 protons and 6 neutrons
What kind of force binds protons and neutrons inside the atomic nucleus?
(a) Weak nuclear force
(b) Strong nuclear force
(c) Electromagnetic force
(d) Gravitational force
Option b – Strong nuclear force
Which property defines the atomic number of an element most accurately?
(a) Count of protons
(b) Sum of protons and electrons
(c) Ion count
(d) Total number of nucleons
Option a – Count of protons
In a negatively charged ion, the number of protons is
(a) Greater than the atomic number
(b) Less than the atomic number
(c) More than the electron count
(d) Fewer than the number of electrons
Option d – Fewer than the number of electrons
What is the formula mass of sodium carbonate without water of crystallization? (Atomic masses: Na = 23 u, C = 12 u, O = 16 u)
(a) 286 u
(b) 106 u
(c) 83 u
(d) 53 u
Option c – 83 u
Which statement best reflects the principle of mass conservation?
(a) A specific compound always maintains a fixed elemental ratio
(b) Gaseous substances combine in simple volume ratios under standard conditions
(c) Matter cannot be created or destroyed
(d) Identical volumes of gases at constant pressure and temperature have the same number of molecules
Option c – Matter cannot be created or destroyed
Which of these elements lacks neutrons?
(a) Oxygen
(b) Nitrogen
(c) Hydrogen
(d) Copper
Option c – Hydrogen
An element contains 18 electrons and 20 neutrons. What is its mass number?
(a) 22
(b) 2
(c) 38
(d) 20
Option c – 38
Which substance serves as a neutron moderator in nuclear reactors?
(a) Ozone
(b) Deuterium
(c) Heavy water
(d) Hydrogen peroxide
Option c – Heavy water
The age of fossils can be estimated by examining the ratio of which carbon isotopes?
(a) C-12 and C-13
(b) C-13 and C-14
(c) C-12 and C-14
(d) C-12 and carbon black
Option c – C-12 and C-14
Which radioactive element(s) enter the food chain and lead to health disorders?
(a) Strontium-90
(b) Iodine-131
(c) Cesium-137
(d) All of the above
Option d – All of the above
Rutherford’s experiment using alpha particles helped reveal the presence of the
(a) Electron
(b) Proton
(c) Atomic nucleus
(d) Helium atom
Option c – Atomic nucleus
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