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Q.
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An Intiative by Sri Chaitanya
a
For transition elements, the 3d-orbitals are filled with electrons after 3p-orbitals and before 4s-orbitals.
b
Non metallic elements are less in number than metallic elements
c
The first ionization enthalpies of elements generally increase across period
d
The properties of elements are periodic function of their atomic numbers.
answer is C.
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