When all parts of a circuit are composed of conducting materials, the circuit is said to be
a. parallel.
b. open.
c. shorted.
d. closed

What defines the mass number of an isotope? a. the sum of the neutrons and protons b. the sum of the neutrons and electrons c. the number of neutrons d. the number of protons

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2

What describes the particles in a liquid