Which is the lighest metal in the periodic table ?
Na
H
K
Li
Of the following pairs, the one containing a metalloid element is _________
F&Cl
Ca &Mg
As & Sb
Na & K
The element which does not belong to the first transition series is
Ag
Fe
Cu
V
Amongst the following elements, whose electronic configuration are given below, the one having the highest ionization energy is ____________
[Ar] 3d104s24p3
[Ne] 3s23p2
[Ne] 3s23p3
[Ne] 3s23p1
The element which forms an amphoteric oxide is
Barium
Calcium
Chlorine
Beryllium
Fluorine has low electron affinity than chlorine because of _________.
Bigger radius of fluorine,less density
Smaller radius of chlorine, high density
Smaller radius of fluorine, high density
Smaller radius of chlorine, less density
On Pauling electronegativity scale, the element nearest to fluorine is?
N
O
Ne
CI
Out of the following the atomic number of the element having highest vapour pressure at room temperature is
Z=25
Z=48
Z=30
Z=80
Noble gases are group of elements which exhibit very
Minimum electronegativity
Low chemical activity
High chemical activity
High diamagnetic properties
In halogens,which of the following increases from fluorine to iodine ?
Electro negativity
Oxidising power
First ionization enthalpy
Bond length
