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https://education.jlab.org/itselemental/ele083.html

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Matter is things that have mass and take up space (volume). Bismuth is an example of matter. Matter can be further classified into pure substances and mixtures.

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A radioisotope is a type of isotope that automatically undergoes decay to create 2/more tinnier nucleus's and radiation. As a radioisotope, Bi-213, which goes through alpha decay, was used as a treatment for leukemia patients. Bismuth-209 undergoes alpha decay.
The equation is this:

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An isotope is when an atom of an element has the same amount of protons as the element but has a different amount of neutrons. Bismuth does not have any stable isotopes but one previously thought stable isotope was ²⁰⁹Bi. https://pubchem.ncbi.nlm.nih.gov/element/Bismuth

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A mixture is when 2/more substances will join together, not chemically, and will not have a fixed portion/amounts with themselves. A real-life example of Bismuth as a mixture is when it is combined with metals like iron, lead, and tin to create alloys. For example; sprinklers, fire detectors, fuses. https://education.jlab.org/itselemental/ele083.html

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A compound has more than 1 type of atom and is created when two or more than two atoms link chemically (like ionic/covalent bonding). Examples of Bismuth being used as a compound Bismuth Oxide which is an ingredient in the yellow color of paint and makeup. Bismuth carbonate is utilized to cure diarrhea and ulcers. It is also one of the ingredients in Pepto-Bismol.

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A pure substance in which the components of the substance are the same and have the same composition. Pure Bismuth has little use as it is  brittle. The main source of Bismuth is as a by-product when purifying tin, silver, gold, copper, and lead metals.
https://www.rsc.org/periodic-table/element/83/bismuth

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Valence electrons are electrons that are on the outer shell of the energy levels for the atom that participate in bonding with other atoms. Bismuth has 5 valence electrons.

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An anion is a type of ion with a negative charge which is made when 1/more electron gets added to the neutral atom. An anion is named differently from a cation, for example, non-metal anions end with -ide at the end of their element name.

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A cation is a type of ion that has a positive charge and is made when a neutral atom gives away 1/more of its valence electrons. Cations are named using their element name. A bismuth cation is Bismuth (3+) and has a +3 charge.

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An ion is an entity with a charge and is created when an atom will lose or gain electrons. Examples of ions are cations and anions.

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The atomic mass is the addition of every particle of the nucleus. The mass number = number of protons + number of neutrons. The mass number is A and the atomic number is Z. The atomic mass for Bismuth is 208.9804 u.

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Elements in the periodic table are assigned their own atomic number which correlates to the number of protons that an atom of that element has. A neutral atom will have the same number of protons and electrons. The atomic number for Bismuth is 83.

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A neutron is a subatomic particle that has no charge and is found in the nucleus of the atom. Bismuth has 126 neutrons. (Number of neutrons = mass number - atomic number).

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A proton is a subatomic particle that is positively charged and is found in the nucleus of the atom. Bismuth has 83 protons.

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An electron is a subatomic particle that is negatively charged in an ion or atom. Bismuth has 83 electrons. It orbits the outside of the nucleus of an atom in different energy levels.

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Atoms are made of subatomic particles which are protons, electrons, and neutrons. A particle is a small part of matter and it makes up everything.

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All elements are made of the same type of atoms. Atoms are the tinniest part of an element that be by itself and keep its chemical properties.

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Bismuth is an element, which cannot easily be broken down into smaller substances.  Its symbol (identifier) is Bi. The number 83 on the top left corner of the symbol represents the atomic number (number of protons and electrons). The number 208.980 on the top right corner of the symbol represents the atomic mass (number of neutrons + protons in the nucleus).