In a strong magnetic field, half protons point to the patient`s feet and half to the head. All the protons are matched.

X-rays are made up of ___. A: electrons B: protons C: photons D: Neutrons

The idea that electricity cannot be created or destroyed may seem to imply that electrons and protons cannot be created or destroyed.

All atoms of a given element have the same __________. A: mass B: number of protons C: number of neutrons D: number of electrons and neutrons E: density

The atomic weight of an atom, or the molecular weight of a molecule, is its mass relative to that of a(n) ________ atom. This is essentially equal to the number of protons plus neutrons that the atom or molecule contains.

Nuclides<br/>with the same number of protons but different numbers of neutrons, we<br/>called them:() A: Isotope B: Isomer C: Stable nuclide D: Unstable nuclide

Rutherford proposed ( ) by analyzing the results of the α particle scattering experiment A: Atomic nuclear structure model B: There are neutrons in the nucleus C: Electrons are part of atoms D: The nucleus is made up of protons and neutrons

Which of the following are the meanings of 'positive'? A: showing signs of the medical condition or chemical that is being looked for B: used to emphasize how good or bad something is C: having the type of electrical charge that is carried by protons D: the process of changing the jobs or responsibilities of the people in a particular group or organization

Which of the following is the meaning of 'positive'? A: showing signs of the medical condition or chemical that is being looked for B: used to emphasize how good or bad something is C: to stay alive after you have been very ill or badly injured, or to help someone do this D: having the type of electrical charge that is carried by protons