As the ph of a solution is changed from 3 to 6 ,the concentration of hydronium ions
A increases by a factor of 3
B increases by a factor of 1000
C decreases by a factor of 3
D decreases by a factor of 1000

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

by cartels in other countries, shipped by air, mail, or land. i cant really see your answer choices : /

false

because it does not have the potential to be entirely used up