Atom: Difference between revisions
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Electrons move around the nucleus in defined energy levels known as shells or orbitals. These energy levels are crucial for chemical bonding and reactions. | Electrons move around the nucleus in defined energy levels known as shells or orbitals. These energy levels are crucial for chemical bonding and reactions. | ||
= Atomic Number and Mass Number= | ==Atomic Number and Mass Number== | ||
* Atomic Number (Z): The number of protons in an atom, which determines the element. | * Atomic Number (Z): The number of protons in an atom, which determines the element. | ||
* Mass Number (A): The sum of protons and neutrons in the nucleus. | * Mass Number (A): The sum of protons and neutrons in the nucleus. | ||
* Isotopes: Atoms of the same element with different numbers of neutrons, leading to variations in atomic mass. | * Isotopes: Atoms of the same element with different numbers of neutrons, leading to variations in atomic mass. | ||
= Properties of Atoms= | = Properties of Atoms= | ||
Atoms exhibit several fundamental properties: | Atoms exhibit several fundamental properties: | ||