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28 Cards in this Set

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  • Back
In chemical compounds, covalent bonds form when-
pairs of electrons are shared between two nonmetal atoms
the elements that are characterized by having six electrons in the p sublevel belong to which family of elements
noble gases
which of these elements contain only three valence electrons:

lithium, boron, scandium, nitrogen
nitrogen
In the compound soidum fluoride, NaF, the sodium atom loses one electron and the fluorine atom gains one electron to form ions that have electron configurations similar to:

helium
oxygen
neon
calcium
neon
and ion and its parent atom have the same
electron configuration*****

(bonding test)
which of the following is not a property of an ionic compound:

low boiling point
brittleness
hardness
molten compound conducts electricity
low boiling point
compared with ionic compounds, molecular compounds have
have lower melting points
What is the metallic ion in the compound
cuCl2
Cu 2+
the chemical bond formed when 2 atoms share one or more pairs of electrons is
a covalent bond
If two covalently bonded atoms move father apart or closer together than a distance of the bond length, the potential energy of the atoms
increases
an electron that occupies the outermost energy level of an atom is known as a ______ ________
valence electron
a compound resulting from the formation of an ionic bond between a cation and an anion is a ....
ionic compound
in naming a binary ionic compound, the name of the ____ appears first followed by the name of the ____
metal, nonmetal
In a covalent bond, shared electrons move within a space called...
molecular orbital
a molecule is a neutrally charged group of atoms held together by one or more _______ _______
covalent bonds
the bond length is the average distance between the ______ of the ________
nucleus of the two bonded atoms
A compound is composed of 85.64% carbon and 14.36% hydrogen. The compoiund has a formula mass of 42.08 grams. What is the molecular formula?
C3H6
Determine the empirical formula of a compuond that is 9.2% B and 90.8% Cl
BCl3
Pyrazine has the empirical formula C2H2N. Its experimental formula mass (expiremental molar mass) is 80.1 g/mol. What is the molecular formula?
C4H4N2
Chlorite
ClO2-
How is a covalent bond formed
a covalent bond is formed when electrons are shared by 2 elements on the molecular orbital
Describe an experiment to de3termine if a substance is ionic or covalent
you could take the substance and see what happens when you dissolve it and see if it conducts electricity (ionic)

You cold see if it has a high (ionic) or low (covalent) melting/boiling pts
If a student needed to obtain 8.0 mL of a liquid for an experiment, the appropriate piece of laboratory equipment to use would be a --
10.0 mL graduated cylinder
in any chemical or physical process, energy is neither created nor destroy =
law of conservation of energy
a temperature of 323 K is equivalent to
50 degrees C
energy is transferred from hot water to a cup...energy in the form of
heat
****In division and multiplication the answer must not have more significant figures than the
NUMBER IN CALCULATION WITH THE FEWEST SIGNIFICANT FIGURES
a chemical reaction that releases energy is a _____ _____
exothermic reaction