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Understanding Chemical Compounds: Elements, Bonds, and Properties

A compound is formed when two or more different elements bond together due to unstable valences. Elements rarely exist in their pure form and tend to fulfill a full valence of 8 electrons by bonding. Chemical formulas describe elements and atom quantities in substances. Different bonds like ionic, covalent, and metallic bonds play a role in compound formation, influencing properties. Ionic bonds involve electron transfer, while covalent bonds share valence electrons. Metallic bonds involve shared valence electrons among atoms in metals.

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Understanding Chemical Compounds: Elements, Bonds, and Properties

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  1. A compound is two or more different elements(atoms) bonded together. Elements are rarely found in their pure form because they have unstable valences. They are always trying to fill or be left with a full valence of 8 electrons. When elements form compounds their properties change. Like Na (explosive) and Cl (deadly) combine to make salt.

  2. A chemical formula describes the type of elements and the number of atoms in a substance. The subscript tell how many atom of each element are in a substance. Ionic bond Covalent bond Metallic bond The valence electrons are shared in a metallic bond.

  3. In an ionic bond valence electrons are transferred between atoms. Atom are attracted in ionic bonds because positive and negative ions are created and opposites attract. The net charge of an ionic compound will be neutral or no charge. No positive positive positive negative negative negative Neutral or no charge

  4. PCl3 covalent P Cl

  5. AlF3

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