1
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Write the electronic configuration
of elements from atomic number 11 to 18.
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2
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What similarities do you find in
their electronic configuration?
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Elements from atomic
number 11 to 18 have the same number of electrons in their first two shells.
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3
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How many valence electrons are
present in sodium, aluminum and chlorine?
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4
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Write the electronic configuration
of (i) Mg and Ca and (ii) F and Cl.
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5
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Do these elements contain same
number of valence electrons?
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(Valence electrons: The number of electrons in the outermost
orbit)
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6
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Write the electronic configuration
of B, O, Na, Al, S and K.
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