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MHT CET202521 Apr 2025Evening ShiftChemistryStructure of AtomActual

Which from following statements is NOT true about isotopes?

Options

  1. AThese are the atoms of same elements.
  2. BThey have same chemical properties.
  3. CThey occupy same position in the modern periodic table.
  4. DThey have equal number of neutrons.

Correct answer

D. They have equal number of neutrons.

Step-by-step solution

Isotopes are atoms of the same element sharing identical atomic numbers but differing in neutron counts and mass numbers. All isotopes of a given element possess identical chemical properties due to equivalent electron configurations, and consequently occupy the same position in the periodic table. Statement D is incorrect, as the defining characteristic of isotopes is their unequal number of neutrons.

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