An atom of chromium has 24 protons, 28 neutrons, and 24 electrons. a chromium atom particles in the necleus

52

Explanation:

protons and neutrons are in the nucleus so u have to add those together

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.

the role of the microscope world in creating new materials .