Question

what makes an atom? provide an answer in complete sentences that describes the components of an atom and how those components relate to the atomic symbol for the various isotopes of an atom.

Explanation:

An atom is made of a nucleus containing protons and neutrons, surrounded by electrons. The atomic number (number of protons) determines the element and is part of the atomic symbol. Isotopes of an element have the same number of protons but different numbers of neutrons, and this is reflected in the mass - number part of the atomic symbol.

Answer:

An atom is composed of a nucleus with protons and neutrons, and electrons that orbit the nucleus. The number of protons in the nucleus is the atomic number, which defines the element and is indicated in the atomic symbol. Isotopes of an atom have the same atomic number (same number of protons) but different mass - numbers (due to different numbers of neutrons), and these mass - numbers are also part of the atomic symbol for the specific isotope.