Calculate the total current in this circuit. First calculate the current going through each resistor

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Which statement best describes resistance? resistance is a. how well a current will flow in a material and is measured in volts. b. how well a material conducts an electrical charge and is measured in ohms. c. the ability of a material to attract a positive charge to create a current. d. the ability of a material to repel neutral charges and is measured in ohms.

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?