A. are atoms of the same element
B. have the same chemical properties
C. have the same atomic number
D. have the same mass number

Correct Answer: Option D

D. have the same mass number

SEE ALSO  A cell of e.m.f. 1.5V and internal resistance of 2.5Ω is connected in series with an ammeter of resistance 0.5W and a resistor of resistance of 7.0Ω. Calculate the current in the circuit.

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