[amp_mcq option1=”1″ option2=”4″ option3=”18″ option4=”29 E. None of the above” correct=”option4″]
The correct answer is D. 29.
A proton is a subatomic particle with a positive electric charge of 1 elementary charge and a mass that is approximately 1.672621777 Ã 10â27 kg, which is 1836 times the mass of the electron. Protons belong to the first generation of the lepton particle family, and are generally thought to be elementary particles because they have no known components or substructure. The proton is the nucleus of the hydrogen atom, and together with neutrons, forms the nuclei of other atoms. The number of protons in the nucleus is the atomic number, and defines the chemical element. For example, all carbon atoms have 6 protons in their nucleus.
The nucleus of the copper atom contains 29 protons. This is because copper has an atomic number of 29. The atomic number is the number of protons in the nucleus of an atom. It is also the number of electrons in a neutral atom.
The other options are incorrect because they do not represent the number of protons in the nucleus of the copper atom.