Name the element having atomic number 105.
Kurchatovium
Dubnium
Nobelium
Holmium
The element with lowest ionisation potential is
Na
K
Rb
Cs
________ is the least electronegative element.
F
Fr
Cl
Which of the following represents the correct order increasing electron gain enthalpy ?
S< O < Cl < F
Cl < F < O < S
O < S < F < Cl
F < S < O < Cl
Which of the following has the highest electron affinity?
F-
O-
O
Variable oxidation state and degenerated orbital shows
S-block element
P-block element
d- block element
All of these
Molybdenum metal is related to which block?
S- block
P-block
d - block
none of these
Correct order of raddi is
Na < Be < B
F- < O2 - < N 3-
Na < Li < K
Fe3+ < Fe2+ < Fe4+
Which one of the following is not a chalcogen?
S
Se
The ionisation energy will be maximum for
Be
Li
B
H
