Which electronic configuration of an element has abnormally high difference between second and third ionisation energy ?
The horizontal columns in a periodic table are known as
group
period
class
block
Which block consists of elements of groups 13(IIIA),14 (IVA) 15(VA),16(VIA),17(VIIA) and 18 ?
s
p
d
f
Which of the following elements has maximum electron affinity ?
Cl
Br
I
F
The ionisation of hydrogen atom would give rise to
hybride ion
hydronium ion
proton
hydroxyl ion
One would expect proton to have very large
charge
ionisation potential
hydration energy
radius
Which block consists of elements of groups 3(IIIB),4(IVB),5(VB),6(VIB),7(VIIB),8,9,10(VIII),11(1B),12(IIB) ?
One of the characteristic properties of non-metals is that they
are reducing agents
form basic oxides
form cations by electron gain
are electronegative
Who showed that the atomic number and not the atomic mass is the most fundamental property of an element and is responsible for its physical and chemical behaviour ?
Dobereiner
Mosely
Mendeleev
Rutherford
Ionic radii are
inversely proportional to effective nuclear charge
inversely proportional to square of effective nuclear charge
directly proportional to effective nuclear charge
directly proportional to square of effective nuclear charge
