Which one of the following is not a chalcogen?
S
Se
O
Na
Electronic configuration of an element 'x' having atomic number 24 is
[Ne]2p53s1
[Ar] 3d64s2
[Ar]3d44s2
[Ar]3d54s1
________ is the least electronegative element.
F
Fr
Cs
Cl
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 ratios
Which of the following have highest melting point ?
p- block elements
s- block elements
d- block elements
none of these
Molybdenum metal is related to which block?
S- block
P-block
d - block
Which is the property of non-metal?
Electronegative
Basic nature of oxide
Reducing property
Low ionisation potential
The diagonal partner of element B is.
Li
Al
Si
Mg
______ 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 (Z=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
