Discussion
Read the following statements :
Statement I : Isotopes of an element have the same chemical properties.
Statement II : Chemical properties do not depend on number of neutrons.
Choose the correct option :
Answer: D
Both statements are true and Statement II is the correct reason for Statement I.
Isotopes are atoms of the same element with the same number of protons and electrons but different numbers of neutrons, such as carbon-12 and carbon-14. Chemical properties depend on the electrons, in particular the arrangement of the outer (valence) electrons, which isotopes share.
Neutrons sit in the nucleus and take no part in chemical bonding; they change only the mass and physical properties such as density. That is exactly why isotopes behave the same chemically, so II explains I.
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