Chemistry chapter 7, 8, and 9 – Flashcards
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Electron dot structure
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A deception of valence electrons around the symbol of am element
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Ionic compound
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Compound of cations and anions
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Valence electron
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An electron in the highest occupied energy level of an atom
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Ionic bond
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The force of attraction binding opposite charged ions together
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Chemical formula
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Shows the kinds and numbers of atoms in the smallest representative unit of substance
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Alloy
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A mixture of two or more elements, at least one of which is a metal
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Octet rule
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Atoms in most compounds tend to achieve the electron configuration of a noble gas
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Formula unit
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Lowest whole number ratio of ions in an ionic compound
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Metallic bond
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The attraction of valence electrons for positive metal ions
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How many valence electrons does an atom of any element in group 6A have
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6
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Metals are good conductors of electricity because they
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Contain mobile valence electrons
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In forming chemical bonds, atoms tend to attain
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The electron configuration of noble gas atoms
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An ionic compound is
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Electrically nuetral, held together by ionic compounds, composed of anions and cations
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Which of these is NOT a characteristic of most ionic compounds
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Has a low melting point
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Which element when combined with chlorine would most likely form an ionic compound
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Lithium
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A cation is any atom or group of atoms with
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A positive charge
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The cation Fe3+ is formed when
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An atom of iron loses three electrons
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Non polar covalent bond
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A covalent bond formed by the equal sharing of bonding electrons by two atoms
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Hydrogen bond
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Force that occurs when a hydrogen atom that is covalently bonded to a very electronegative atom is also weekly bonded to an unshared pair of electrons in the same or nearby molecule
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Double covalent bond
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A covalent bond involving two pairs of electrons each atom donates one pair of electrons to the bond
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Dispersion force
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Interaction caused by the motion of electrons
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Molecular formula
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Shows the kinds of numbers present in a molecule of a compound
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Structural formula
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Chemical formula that shows the arrangement of atoms in molecules and polyatomic ions
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Polar bond
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A covalent bond between two atoms of different electronegativities in which the bonding electrons are not shared equally
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Triple covalent bond
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A covalent bond in which three pairs of electrons are shared by two bonded atoms
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Which of these elements does not exist as a diatonic molecule
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He
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Which one of the following compounds is not covalent
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KCI
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How many valence electrons does an atom of any halogens have
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7
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A diatonic molecule with a triple covalent bond is
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N2
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If a bonding pair of electrons is unequally shared between two atoms, the bond is
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Polar covalent
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Which of the following compounds is not ionic
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CO2
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a covalent bond forms
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When atoms share electrons
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Which of these compounds would NOT have covalent bonds
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K2o
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Which of the following is the weakest
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Dipole interaction
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The carbon tetrachloride molecule is
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Tetrahedral
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Cation
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Any atom or group of atoms with a positive or negative charge
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Anion
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Any atom or group of atoms with a negative charge
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Polyatomic ion
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Tightly bound group of atoms that behaves as a unit and carries a charge
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Monoatomic ion
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Consists of a single atom with a positive or negative charge
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Binary compound
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A compound composed of two different elements
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A cation is any atom or group of atoms with
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A positive charge
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A molecular formula
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Shows the number and kinds of atoms in a molecule of a compound
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The metals in group 1A, 2A, and 3A
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Lose electrons when they form ions
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When naming an ion of a transition metal that has more than one common ionic charge, the numerical value of the charge is indicated by
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Roman numeral following the name
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In naming a binary or molecular compound , the number of atoms of each element present in the molecule is indicated by
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Prefixes
