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Which pair of atomic numbers represents s-block elements?
Options
(a) 3,12
(b) 6,12
(c) 7,15
(d) 9,17
Correct Answer:
3,12
Explanation:
Last electron goes to s-subshell.
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Question Type: Memory
(964)
Difficulty Level: Easy
(1008)
Topics: Classification of Elements and Periodicity
(94)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The oxidation numbers of hydrogen in KH,MgH₂ and NaH are respectively
- What is the value of electron gain enthalpy of Na+ if IE₁ of Na =5.1 eV ?
- A sample of chloroform before being used as an anaesthetic agent is tested by
- A hydrocarbon contains 20% hydrogen and 80% carbon.The empirical formula is
- Excess of Na⁺ ions in air system causes
Question Type: Memory (964)
Difficulty Level: Easy (1008)
Topics: Classification of Elements and Periodicity (94)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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