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19 Cards in this Set
- Front
- Back
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Molecule |
a neutral group of atoms that are held together by covalent bonds |
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Molecular compound |
A chemical compound whose simplest units are molecules |
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Chemical formula |
the relative numbers of atoms of each kind in a chemical compound by using atomic symbols and numerical subscripts |
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Molecular Formula |
shows the types and numbers of atoms combined in a single molecule of a molecular compound |
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Bond Energy |
energy require to break a chemical bond and form neutral isolated atoms |
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Electron-dot notation |
an electron-configuration notation in which only the valence electrons of an atom of a particular element are shown, indicated by dots placed around the element's symbol |
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Lewis structures |
formulas in which atomic symbols represent nuclei and inner-shell electrons, dot pairs or dashes between two atomic symbols represent electron pairs in covalent bonds, and dots adjacent to only one atomic symbol represent unshared electrons Ex. H-H :F-F: |
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Structure formula |
indicates the kind, number, arrangement, and bonds but not the unshared pairs of the atoms in a molecule |
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Single bond |
a covalent bond in which one pair of electrons is shared between two atoms |
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Multiple Bonds |
multiple covalent bonds |
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Resonance |
refers to bonding in molecules or ions that cannot be correctly represented by a single lewis structure |
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Main idea 1 |
Covalent bonds form from shared electrons |
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2 |
Bond lengths and energy vary from molecule to molecule
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3 |
Atoms tend to form bonds to follow the octet rule
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4 |
Dots placed around an element's symbol can represent valence electrons |
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5 |
Electron-dot notations can represent compounds
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6 |
Some atoms can share multiple pairs of electons |
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7 |
Resonance structures show hybrid bonds
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8 |
Some compounds are networks of bonded atoms |
