First slide

Atomic & physical properties

Question

A, P, X, B and E are the elements belonging to 14^th group of Modern periodic table. The correct trend of resistivityfor these elements is A > P = X > B > E. The element ‘P’ in the sequence is

Moderate

A

Pb
B

Ge
C

Si
D

Either 2 or 3

Solution

Atomic radius trend…C<Si<Ge<Sn<Pb;
IP₁and M.P trend…C>Si>Ge>Pb>Sn;
EN trend…C>Pb>Si=Ge=Sn;
Density…..C(graphite)<Si<C(diamond)<Ge<Sn<Pb;
B.P trend…C>Si>Ge>Sn>Pb;
Resistivity…C>Si=Ge>Pb>Sn;
Conductivity…C<Si=Ge<Pb<Sn

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