Consider the following pairs of species and identify which pair represents 'Isotones':
Correct Answer: ¹⁴C₆ and ¹⁵N₇
Subject: chemistry
- ¹⁸Ar₄₀ and ²⁰Ca₄₀
- ¹H₁ and ²H₁
- ¹⁴C₆ and ¹⁵N₇
- Na⁺ and O²⁻
Explanation: • <b>Key Fact</b>
Isotones are atoms of different elements having the exact same number of neutrons.
• <b>Supporting Detail</b>
In ¹⁴C₆, Neutrons = 14 - 6 = 8. In ¹⁵N₇, Neutrons = 15 - 7 = 8. Both have 8 neutrons.
• <b>Related Concept</b>
Option A represents Isobars (same mass 40). Option B represents Isotopes (same atomic no. 1).
• <b>Why wrong options are wrong</b>
Option D represents Isoelectronic species (same electrons = 10).
• <b>Exam Trick</b>
Isotones = Same Neutrons. Isobars = Same Mass (Bhar).
• <b>Additional Info</b>
Isotones have completely different chemical properties.