Chemical Bonding Lab - Jack Beasca AP Chemistry Pd 1...

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Jack Beasca 1/19/15 AP Chemistry Pd. 1 Chemical Bonding Lab Purpose: To identify whether a bond between two atoms is ionic, covalent, or polar covalent. To determine the physical characteristics of six unknown compounds Introduction: Seldom do you find atoms existing independently in nature. They are usually found bonded as compounds. This is because atoms are more stable if they have a full outer energy level, with eight valence electrons filling the s and p orbitals. Exceptions to this "octet rule" are hydrogen and helium in Period 1, which have only one energy level and are stable with a filled s orbital. For all other atoms, the octet rule can be satisfied by transferring or sharing electrons to form either ionic or covalent compounds. Chemical bonds between atoms are rarely literally covalent, sharing valance electrons equally, or literally ionic, demonstrating a complete transfer of valence electrons. There are physical characteristics that can help into determining whether a compound is ionic or covalent. These characteristic include: appearance, melting point and boiling point, solubility in water, and electrical conductivity. Procedure: 1. We took an aluminum weighing dish to the Shared Materials Station. We placed one-half of a minispoon of each unknown compound in the dish, in the order shown in the diagram.
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