At STP or standard conditions, which list of elements contains a solid, a liquid, and a gas? A. Hafnium, Mercury, and Helium
B. Barium, Bromine, and Boron
C. Chromium, Chlorine, and Carbon
D. Selenium, Tin, and Strontium

B.hafnium, mercury,helium

Explanation:

because the atomic number of hafnium is 72is a solid, mercury is a gas the atomic number is 80,

helium is a gas the atomic number is 2

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.

1.solid

2.carbon dioxide

3.helium