General Science - Physics (Basics)
Which of the following elements has the electronic configuration 1s² 2s² 2p⁶ 3s² 3p¹?
Which of the following elements has the electronic configuration 1s² 2s² 2p⁶ 3s² 3p¹?
easy Q3 of 15
Step-by-Step Solution
Step 1: Understand electronic configuration
The given configuration ends with 3p¹, indicating one electron in the 3p subshell.Step 2: Identify element by configuration
Aluminium has atomic number 13 with configuration 1s² 2s² 2p⁶ 3s² 3p¹. Silicon has 3p², Phosphorus 3p³, Magnesium 3s² only.Final Answer:
Aluminium → Option CQuick Check:
Electronic configuration 3p¹ = Aluminium ✅
Quick Trick: 3p¹ electron corresponds to Aluminium (atomic number 13).
Common Mistakes:
- Confusing Aluminium with Silicon or Phosphorus due to similar configurations.
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