Please explain chemistry unit 3 structure of atom
Chemistry
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The structure of an atom involves a central nucleus containing protons (positive charge) and neutrons (no charge). Electrons (negative charge) orbit the nucleus in specific energy levels or shells.
- The atomic number (Z) of an element is equal to the number of protons in the nucleus, which defines the element.
- The mass number (A) is the total number of protons and neutrons in the nucleus.
- Isotopes are atoms of the same element that have different numbers of neutrons, and therefore different mass numbers.
- Electrons are arranged in electron shells and subshells (s, p, d, f) according to their energy levels. The electron configuration describes this arrangement.
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