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