CHMA10H3 Chapter 3: Chapter 3 – Molecules, Compounds, and Chemical Equations

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CHMA10H3 Full Course Notes
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Chapter 3 molecules, compounds, and chemical equations. Ionic bonds: occurs between metals and nonmetals, transfer of electrons from 1 atom to another. Covalent bonds: occurs between 2 or more nonmetal , sharing of electrons from 2 atoms to another. 3. 3 representing compounds: chemical formulas and molecular models. Empirical formula: relative number of atoms of each element in compound. Molecular formula: actual number of atoms of each element in compound. Structural formula: uses lines to represent covalent bonds and how they are connected or bonded. Molecular models: ball-and-stick models represents atoms as balls and chemical bonds as sticks, space -filling molecular models have atoms that fill the space between each other to more closely. 3. 4 an atomic-level view of elements and compounds. Atomic elements are those that exist in nature with single atoms as their basic units (most elements) Molecular elements don"t normally exist in nature with single atoms as their basic units, they exist as molecules (diatomic such as o2)

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