Identify if the statement below is true: There are 6 protons and 6 neutrons in the nucleus of a carbon-12 atom that are held by strong nuclear forces.

Label the following statements about J. J. Thomson's cathode-ray tube experiments shown in Figure 2.6 as true or false. (f) By measuring the deflection of the cathode ray beam caused by electric fields of known strength, the charge-to-mass ratio of the electron was calculated.

The _______ of an atom are negatively charged.

Determine whether each of the following statements is true or false. d. The protons in the nucleus of the helium atom are held together by a force called the strong nuclear force.