NCERT Solution for Class 10 Science Chapter 5
Periodic Classification of Elements
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Intext Questions
Page No-91
Questions No-3 Part 1
Name three elements that have a single electron in their outermost shells.
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Hydrogen, Lithium and Sodium
Li and Na
All first group elements like Li, Na, K, etc.
Li, Na, K, Rb
Lithium (Li), sodium (Na), and potassium (K) have a single electron in their outermost
shells.
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