Helium (he), neon (ne) and argon (ar) are all colorless, odorless gases with low chemical reactivity. based on the periodic table, which of the following is correct? a. chlorine (cl) is a colorless, odorless gas with low chemical reactivity. b. carbon (c) is a colorless, odorless gas with low chemical reactivity. c. selenium (se) is a colorless, odorless gas with low chemical reactivity. d. xenon (xe) is a colorless, odorless gas with low chemical reactivity.

D.Xenon (Xe) is a colorless, odorless gas with low chemical reactivity.

Explanation:

As you know in the periodic table you can find elements that are similar in properties and characteristics in the same column so if you find Helium, Neon, and Argon in a column and have certain properties, all the elements that are found in that same column would have similar properties, from the options the only element that can be found in the same column as He, Ne, and Ar, is Xenon, which are all noble gases.

- 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

the answer is c i believe