The electronic configuration of d- block elements is
(n-1) d1-10 ns2p4
(n-1) s2n d1-10
(n-1) d 1-10 ns2
(n-1) p4ns2
The correct order of second ionisation enthalphy of C, N, O and F is
C>N>O>F
C>N>F>O
O>N>F>C
O>F>N>C
The symbol of the element with atomic number 120 is
Une
Ubn
Unp
The energy required to produce 0.5g of hydrogen atom is
262.4 KJ/ mole
656.2 KJ/mole
13.6ev
65.62KJ/mole
On descending a group in the periodic table
Metallic character of elements increases
Electro negativity of elements increases
Ionization energy of elements increases
Size of elements decreases
Similar chemical properties of Zr and Hf may be attributed to
Similar atomic radii
Inert pair effect
Identical ionization energies
similar electronic configuration
The relation between IE3 and IE1 of the element is
IE3>IE1
IE31
IE3=IE1
None of the above
Amongst the following elements, whose electronic configuration are given below, the one having the highest ionisation energy is
[Ar] 3d104s24p3
[Ne] 3s23p2
[Ne] 3s23p3
[Ne] 3s23p1
The most ionic compounds will be obtained from the combination of elements belonging to the ________ groups of the periodic table.
1 & 17
2 & 16
3 & 15
1 & 18
