Identify the incorrect match.Name | IUPAC Official Name(a) Unnilunium | (i) Mendelevium(b) Unniltrium | (ii) Lawrencium(c) Unnilhexium | (iii) Seaborgium(d) Unununnium | (iv) Darmstadtium

1. (a), (i)

2. (b), (ii)

3. (c), (iii)

4. (d), (iv)

Doubtly Asked 30 Oct 2026 NEET UG 2020 Practice test neet Save WhatsApp Report

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Answer: 4. (d), (iv)

IUPAC temporary names come from the atomic number: un=1, nil=0, tri=3, hex=6.

Unnilunium = 101 = Mendelevium. Match (a)-(i) correct.
Unniltrium = 103 = Lawrencium. (b)-(ii) correct.
Unnilhexium = 106 = Seaborgium. (c)-(iii) correct.
Unununnium = 111 = Roentgenium, not Darmstadtium (Z = 110, Ununnilium). (d)-(iv) is incorrect.

Answer: option (4).

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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