Atoms and Molecules Are Normally

Q10: A kilowatt hour is a unit of<br>A)

Q11: Which of the following statements is not

Q12: A negative electric charge<br>A) interacts only with

Q13: Superconductivity occurs in certain substances<br>A) only at

Q14: A current-carrying loop in a magnetic field

Q16: A molecule that has lost an electron

Q17: Direct electric current cannot be used to

Q18: An electric iron draws a current of

Q19: Which of the following statements is not

Q20: The nucleus of an atom<br>A) contains most