(A): With increase in temperature the conductivity of metals decreases. (R): With increase in temperature lattice vibrations increase in metals. `2.4xx10^(24)` atoms.A. Both A and R are true and R is the correct explanation of AB. Both A and R are true and R is not the correct expalantion of AC. A is correct R is wrongD. A is wrong R is correct

(A): With increase in temperature the conductivity of metals decreases

1.	(A): With increase in temperature the conductivity of metals decreases. (R): With increase in temperature lattice vibrations increase in metals. `2.4xx10^(24)` atoms.A. Both A and R are true and R is the correct explanation of AB. Both A and R are true and R is not the correct expalantion of AC. A is correct R is wrongD. A is wrong R is correct
Answer» Correct Answer - 1 mass one unit cell `=2.39xx1.66xx10^(-24)g`

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