2. The successive ionization energies in kJ/mol of an element were found to be: 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 1000 2,250 3,360 4,560 7,00 8,500 27,000 32,000 37,000 43,000 To what family does this element belong? A. Alkali metals b. Alkali Earth metals c. Boron family d. Carbon family e. Nitrogen f. Oxygen family g. Halogens h. Noble Gases

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 best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.