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The s-Block Elements
Be(Z = 4) which has electronic configuration 1s2 2s2 shows electronic configuration of 1s2 2s1 2px1 in excited state and one s-orbital (2s) and one p-orbital (2p) can intermix to form two sp hybrid orbitals which can be used to form BeCl2.
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Why are alkali metals not found in nature?
Lithium shows similarities to magnesium in the chemical behaviour. What is the cause of this similarity?
What is the nature of lithium compounds?
Group 1 elements are called alkali metals. Why?
Why caesium can be used in photoelectric cell while lithium can not be?
In aqueous solution, Li+ ion has lowest mobility. Why?
Lithium has highest ionisation energy in group 1 elements, yet it is strongest reducing agent. Comment.
The softness of group 1 elements increases down the group with increasing atomic number. Give reason.
Which is the most reactive alkali metal and why?
Why alkali metals do not form M2+ ions?
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