Practice question
Question
Which element has the electronic configuration 1s² 2s² 2p⁶ 3s¹?
Explanation
Total electrons = 11, corresponding to Na (period 3, group 1). Others: Mg (12 electrons), Al (13 electrons), Ne (10 electrons).
Related blogs
Guides and insights connected to this topic
Journey Inside the Atom Notes - Atomic Structure, Bohr Model and Electronic Configuration
Explore the fundamentals of atoms, from ancient ideas to Dalton's theory, Bohr's model, and electronic configuration in clear notes.
Periodic Classification of Elements Notes - Dobereiner Triads, Newlands Octaves, Mendeleev and Modern Periodic Table
Explore early attempts to classify elements, covering Dobereiner’s triads, Newlands’ law of octaves and Mendeleev’s table with examples and key details.
Mineral Nutrition Biology Notes - Hydroponics, Essential Elements, Deficiency Symptoms, Nitrogen Cycle and Biological Nitrogen Fixation
Explore plant mineral nutrition notes on hydroponics, criteria for essential elements, deficiency symptoms, and biological nitrogen fixation...
Discussion
Comments
Please log in to join the discussion.
Login to commentNo comments yet. Be the first to start the discussion.