Practice:
1. Why is rain naturally acidic? What is it's pH?
2. How is acid rain formed? How low can it's pH be?
3. How much more acidic is a pH of 3 versus a pH of 6?
4. What are two sources of pollutants in the air?
5. Complete the statements:
a. In an acidic solution, the concentration of H O is
greater/less than OH.
b. In a basic solution, the concentration of H, O is greater/less
than OH.

where are the choice options?

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

if you need further assistance, let me know: )

~ trueboss72