This molecule can be synthesized from an alkyne anion and an alkyl bromide. however, there are two ways in which this molecule can be formed. one way uses a higher molecular weight alkyne anion (part 1) and the other uses a lower molecular weight anion (part 2). draw the two versions in the boxes below. omit spectator ions.

See figures

Explanation:

In this case, we will have different options around the triple bond. On part 1 we have to use the bigger anion, so we have to use the anion in which the benzene ring is included therefore the ethyl would be the halide (see figure 1).

On part 2 we have to use the smaller anion, so the ethyl group would be the anion and the other part of the molecule would be the alkyl halide (see figure 2).

- 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