Question Detail

CHM 101 Quantum Theory and Atomic Structure Objective Question
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Question

What is the electron configuration 1s² 2s² 2p⁶ 3s²?
Options
A A representative element in the s-block
Correct Answer
B A transition element
C A noble gas
D An inner transition element
Correct Answer

Option A is the correct answer.

Detailed Explanation

The configuration 1s² 2s² 2p⁶ 3s² represents magnesium (atomic number 12). The last electrons are in the 3s subshell, placing it in the s-block. s-block elements (groups 1 and 2) are classified as representative elements.

Hint

Elements with their outermost electrons in s orbitals are s-block representative elements.

Question Info

Course: CHM 101
Topic: Quantum Theory and Atomic Structure
Type: Objective
Difficulty: Not specified
Question 1550 of 1872
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