State 3 evidences that the particles of substances are in continuous motion

How is 0.00235 expressed in proper scientific notation? a. 2.35 × 10-3 b. 0.235 × 10-2 c. 2.35 d. 2.35 × 103

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?

Ab c or d ? i’m not sure what the answer is