The element with lowest ionisation potential is
Na
K
Rb
Cs
Molybdenum metal is related to which block?
s- block
p-block
d - block
none of these
Pick the correct answer,
according to the periodic law of elements ,the variation in properties of elements is related to their,
atomic masses
nuclear masses
atomic number
nuclear neutron -proton ratio
The element with atomic number 36 belongs to _______ block in the periodic table.
p
s
f
d
________ is the least electronegative element.
F
Fr
Cl
Electronic configuration of an element 'x' having atomic number 24 is
[Ne]2p53s1
[Ar] 3d64s2
[Ar]3d44s2
[Ar]3d54s1
Name the element having atomic number 105.
Kurchatovium
Dubnium
Nobelium
Holmium
______ is defined as the tendency of an atom in a molecule to attract the shared pair of electrons towards itself.
Electropositivity
Electronegativity
Electron gain enthalpy
Electron affinity
Identify the correct electronic configuration of Cr (2=24)
1s2, 2s2, 2p6, 3s2, 3p6, 3d7, 4s1
1s2, 2s2, 2p6, 3s2, 3p6, 3d5, 4s2
1S2, 2s2, 2P6, S2, 3P6, 3d7, 4s2
1s2, 2s2, 2p6, 3s2, 3p6, 3d6, 4s2
The number of elements present in fifth period of periodic table is
10
8
32
18
