aim 1.....what are the different forms of bonding?

aim 2.....what is molecular polarity?

aim 3.....what is the relationship between bonding and physical properties of solids?

honors

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cross-word puzzle

skills students should be able to do

• distinguish among ionic, molecular, and metallic substances, given their properties

• demonstrate bonding concepts using Lewis dot structures representing valence electrons: transferred (ionic bonding); shared (covalent bonding); in a stable octet

• determine the noble gas configuration an atom will achieve when bonding

• distinguish between nonpolar covalent bonds (two of the same nonmetals) and polar covalent bonds

real-world connections

• saturated vs. unsaturated compounds-health connections

• photosynthesis

• DNA bonding

• free radicals

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Words: arbitrary, broken, conductivity, configuration, covalent, decreases, degree, differentiated, electron-dot, electronegativity, intermolecular forces, ionic, molecular polarity, noble, nonmetals, polar, polyatomic, radius, released, symmetrical, transferred 

Compounds can be _____________ by their chemical and physical properties. Two major categories of compounds are _____  and molecular (covalent) compounds. Chemical bonds are formed when valence electrons are: ___________ from one atom to another (ionic), shared between atoms (covalent), mobile within a metal (metallic). In a multiple _________ bond, more than one pair of electrons is shared between two atoms. _________   __________can be determined by the shape of the molecule and the distribution of charge. ____________ (nonpolar) molecules include CO₂, CH₄, and diatomic elements. Asymmetrical (______) molecules include HCl, NH₃, and H₂O. When an atom gains one or more electrons, it becomes a negative ion and its _______ increases. When an atom loses one or more electrons, it becomes a positive ion and its radius __________. When a bond is ________, energy is absorbed. When a bond is formed, energy is _________. Atoms attain a stable valence electron ____________ by bonding with other atoms. _______ gases have stable valence configurations and tend not to bond. Physical properties of substances can be explained in terms of chemical bonds and _____________  ________. These properties include ___________, malleability, solubility, hardness, melting point, and boiling point. _________ - ____ diagrams (Lewis structures) can represent the valence electron arrangement in elements, compounds, and ions. _____________ indicates how strongly an atom of an element attracts electrons in a chemical bond. Electronegativity values are assigned according to _________ scales. The electronegativity difference between two bonded atoms is used to assess the ________ of polarity in the bond. Metals tend to react with _________ to form ionic compounds. Nonmetals tend to react with other nonmetals to form _________ (covalent) compounds. Ionic compounds containing ___________ ions have both ionic and covalent bonding.

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