Which characteristics of weak noncovalent interactions enable the assembly, stability, and functions of biomolecules? (pick one or more) A. They are readily reversible, whereas covalent bonds require a much larger input of energy to break.

B. They have a large cumulative effect, although individual interactions are relatively weak.

C. They are stable, requiring a large amount of energy to break.

D. They are not affected by the surrounding aqueous environment.

- 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

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

with this one i know the answer in craters one reason i looked it up and i learned about it there is my evidence