What best describes the states of nonmetals when they are at room temperature? a. most nonmetals are gaseous, but some are liquid or solid. b. all nonmetals are gaseous unless they bond with a metal. c. most nonmetals are solids, but some are gaseous or liquid. d. all nonmetals are solid unless they bond with a metal.

Option (A) is the correct answer.

Explanation:

Non-metals are the substances that contain less number of electrons as compared to metals.

Most of the non-metals exist in gaseous state at room temperature. For example, oxygen, fluorine, chlorine, nitrogen etc are all gases at room temperature.

Whereas bromine exist as a liquid ate room temperature and some non-metals like carbon, iodine, arsenic etc exist as solid at room temperature.

Thus, we can conclude that the statement, most nonmetals are gaseous, but some are liquid or solid, best describes the states of nonmetals when they are at room temperature.

- 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