NCERT Solution for Class 10 Science Chapter 5
Periodic Classification of Elements
NCERT Books for Session 2020-2021
CBSE Board and UP Board
Intext Questions
Page No-90
Questions No- 3 Part 2
Name two elements that have two electrons in their outermost shells.
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Calcium and Magnesium
According to NCERT Textbook, it is Mg (Magnesium) and Ca (Calcium).
Second group elements
Be and Ca
It is Be, Ca, Mg and Sr
not Ma
All second group elements of periodic table like Be, Ca, Ma, Sr, etc.
Magnesium (Mg) and calcium (Ca) have two electrons in their outermost shells.
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