A wet clay brick measuring 2 * 4 * 6 inches has an initial water content uniform 12% by weight. At time t = 0, the brick is exposed on all sides to air so that the moisture content of the surface is kept at 2% by weight. After 5 h, the average moisture content is 8% by weight. Estimation: (a) the diffusivity of the water in the clay in cm2 / s; and (b) the additional time for the average moisture content to reach 4%. in weight. All moisture content is on a dry basis

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."

it would be a gas formation