Which of dalton's ideas on atomic theory have been applied to current theory? check all that apply. a. all atoms are the same color. b. atoms can bond to and un-bond from each other. c. atoms are made up of smaller particles. d. all matter is made up of units called atoms?

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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.