Key terms: reset functional groups create sites in molecules. the polar part of a molecule that can hydrogen bond to water is said be . pi (π) bonds create sites and will react with electron-deficient species. a electronegative heteroatom like nitrogen, oxygen, or a halogen makes a carbon atom . the nonpolar part of a molecule that is not attracted to water is said to be . a lone pair on a heteroatom makes it basic and .

answer: option (a) is the correct answer.

explanation:

the measurement of hydrogen ions in a solution is known as ph.

if ph of a solution is less than 7 then the solution is acidic. if ph of a solution is greater than 7 then the solution is basic.

when the ph of a solution equals 7, then the solution is considered as neutral.

the ph of pure water is 7, therefore, it means that concentration of hydronium ions equals that of hydroxide ions.