Which of the following might a biologist choose to study? a. the pigments used in claude monet's paintb. wind patterns on marsc. the effects of ultraviolet light on red paintd. the causes of honeybee deaths in beehives

D

Explanation:

All the others are unrelated to biology as biology is the study of life (hence bio) and not chemistry or anything else.

- 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

if you're asking what comes out, it's steam.