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.
Yes. The nucleus contains only protons, which are positively charged, and usually also has neutrons, which have no electric charge. Therefore, the nucleus is always positively â¦ charged, and the corresponding negative charge is contained in the electrons around the nucleus.