Atom: Difference between revisions
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* Reactivity: Dependent on the arrangement of electrons in the outermost shell. | * Reactivity: Dependent on the arrangement of electrons in the outermost shell. | ||
= Atomic Theories= | ==Atomic Theories== | ||
Several theories have been proposed to explain atomic structure: | Several theories have been proposed to explain atomic structure: | ||
* Dalton's Atomic Theory (1803): Proposed that atoms are indivisible and combine to form compounds. | * Dalton's Atomic Theory (1803): Proposed that atoms are indivisible and combine to form compounds. | ||
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* Bohr’s Model (1913): Introduced quantized electron orbits. | * Bohr’s Model (1913): Introduced quantized electron orbits. | ||
* Quantum Mechanical Model: The modern atomic theory describing electron probability clouds instead of fixed orbits. | * Quantum Mechanical Model: The modern atomic theory describing electron probability clouds instead of fixed orbits. | ||
= Importance of Atoms in Chemistry= | = Importance of Atoms in Chemistry= | ||
Atoms play a crucial role in: | Atoms play a crucial role in: | ||