Describe the composition of the nucleus of an atom.
a) it is composed of protons.
b) it is composed of protons and neutrons.
c) it is composed of protons and electrons.
d) it is composed of protons, neutrons, and electrons.

How will the emission of an alpha particle affect the atomic number of an atom

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit