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🔗 Connection: Structure and Chemical Properties
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The arrangement of elements according to atomic number and electron configuration means that elements with similar properties are found in the same group. This means:
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- Members of a group have the same number of valence electrons, so their chemical reactions are similar.
- Properties change periodically across the periods: metallic character decreases from left to right or increases from top to bottom.
- Atoms in the same group show similar bonding behavior and reactivity.
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Group Valence Electrons Notable Property 1 (Alkali Metals) 1 Highly reactive, easily form ions 17 (Halogens) 7 Readily form salts with metals 18 (Noble Gases) 8 Very unreactive -
Thus, the Periodic Table helps us understand and predict chemical properties thanks to its systematic structure.
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⚙ connection