First slide

Atomic and physical properties

Question

Which of the following increases regularly down the group in 13 group?

Easy

A

Electronegativity
B

Melting point
C

Density
D

All of these

Solution

Density in g cm^-3 : B = 2.35, Al = 2.70, Ga = 5.90, In =7.31, Tl = 11.85.
Electronegativity order $B > Tl > In > Ga > Al$
Melting point order $B > Al > Tl > In > Ga$

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