Usage - Pronoun-Antecedent Agreement. A pronoun is a word used to stand for (or take the place of) a noun. A word can refer to an earlier noun or pronoun in the sentence. Example:
A subatomic particle is a unit of matter or energy that's the fundamental makeup of all matter. According to modern atomic theory, an atom has a nucleus, which is its center, or core. The nucleus contains subatomic particles: protons and neutrons. Protons are positively-charged particles. Neutrons are neutral particles.
ï· Proton: a subatomic particle that has a positive charge and that is located in the nucleus. of an atom; the number of protons of the nucleus is the atomic number, which determines. the identity of an element. ï· Neutron: a subatomic particle that has no charge and that is located in the nucleus of an.