Consider the structure of an atom, which consists of a nucleus containing protons and neutrons, surrounded by electrons that orbit the nucleus in various energy levels. Each element on the periodic table is defined by its number of protons, also known as its atomic number. The arrangement of electrons in an atom determines its chemical properties and how it interacts with other elements. For example, elements with similar electron configurations are grouped together in the same column of the periodic table, known as a group, and they exhibit similar chemical behavior. Based on this understanding of atomic structure and the periodic table, which of the following statements is true?
A) The number of neutrons in an atom determines its chemical properties.
B) The electrons in the outermost energy level determine an element's chemical reactivity.
C) Protons orbit the nucleus in various energy levels.
D) Elements in the same period of the periodic table have similar chemical properties.