2.(06.01 MC) The graph compares the kinetic energies of the molecules in four gas samples. Each graph shows a normal distribution, so the average is the center.
Fraction of Molecules
Kinetic Energy
Which sample is likely to have the lowest temperature? (1 point)

The gas A is likely to have the lowest temperature

Explanation:

In a gas, the kinetic energy is directly proportional to the temperature under constant pressure and volume.

As you can see in the problem, the average of A has a low kinetic energy. But the average is increasing between B, C and D.

As the gas A has the lowest average kinetic energy:

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms