covalent bonding test
list the 7 diatonic elements
H, N, O, F, Cl, Br, I
in a single covalent bond atoms are sharing ____ electrons
2
Trinitrogen hexafluoride
N3F6
disilicon tetrachloride
Si2Cl4
why is water a polar molecule?
because it has partial negative and positive sides ( the dipoles are not arranged symmetrically)
why is carbon dioxide a nonpolar molecule?
because the bonds, while polar, are arranged symmetrically and therefore the molecule doesn't have a partial negative/ positive charge
why are diatomic molecules always nonpolar molecules?
because they exist between the same atom- no difference in electronegativities
name the following covalent compounds: CO
carbon monoxide
identify as either ionic or covalent: NO
covalent
identify as either ionic or covalent: SO2
covalent
name the following covalent compounds: Br2I
dibromine moniodide
which group forms single covalent bonds when the molecule is diatomic?
hydrogens and halogens
identify as either ionic or covalent: CaO
ionic
identify as either ionic or covalent: CuSO4
ionic
what are triple covalent bonds?
nitrogen
name the following covalent compounds: NO2
nitrogen dioxide
covalent bonds are between _________ and ________
nonmetals and nonmetals
what is polar molecule; oil does not dissolve in water. is oil a polar or nonpolar
nonpolar
name the following covalent compounds: S8O5
octasulfur pertaoxide
explain polar covalent molecules (what gives them polarity?)
one atom has a higher electronegativity than the other- it has more attraction for the shared electrons
what are double covalent bonds?
oxygen
what are the two types of covalent molecules?
polar and nonpolar
what happens during covalent bonding?
sharing electrons
name the following covalent compounds: SiF4
silicon tetrafluoride
what is the list of the covalent bond in order from weakest to strongest
single, double, triple
the overal charge of a compound should be..
zero
in a double covalent bond atoms are sharing ___ electrons
4
in a triple covalent bond atoms are sharing ___ electrons
6
Pentabromine heptachloride
Br5Cl7
diphosphorus pentoxide
P2O5
phosphorus trichloride
PCl3
Phosphorus monoxide
Po