Copper and gold have similar reactive properties. On the Periodic Table of the Elements, these elements are most likely to... Select one :

A || have nearly the same mass.

B || have the same number of protons.

C || be in the same group.

D || be in the same period.

According to the passage, which of these is true about gray water systems? a) gray water systems use plants that require less water. eliminate b) gray water systems require the use of less fossil fuels. c) gray water systems reduce the amount of fresh water used. d) gray water systems reduce the amount water used by shower heads.