How are radicals charged?

A radical has an unpaired electron, but does not have a net charge because the number of protons equals the number of electrons.

Explanation:

this is in my text book

sooo ya

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.