test #3

hydrogen

In a covalent compound, which of the following will ALWAYS form only one single bond? helium, boron, hydrogen, or sulfur?

2

In the correct Lewis structure fir water, how many unshared pairs of electrons will oxygen have? 3, 2, 1, or 4?

metals with a positive charge

cations will always be

triple bond

diatomic nitrogen contains a:

double bond

diatomic oxygen shares 4 electrons, so diatomic oxygen must contain a:

electrostatic force

in ionic compounds, the positive cations are attracted to the negative anions and are held together like a magnet. this force is called:

carbon tetrahydride

name the covalent structure: CH4

Mg2+

the charge on a magnesium ion will always be

O2-

the charge on an Oxide ion will always be:

subtract one formula unit from the non-metal

what is wrong with the following ionic compounds formula units? MgCl3

aluminum fluoride

what would the name be for ALF3

least electronegative

when drawing Lewis structures, what determines the Central atom?

-1 charge

when ionized, the Halogen group will always have a: ________ charge

polar

when the electrons in a covalent bond are shared unequally it is said ti be:

Al2O3

which is the proper chemical formula for Aluminum Oxide

MgO

which of the following compounds will have the highest melting point and conduct electricity when dissolved in a polar solution? C6H12O6, H2O, C2H5OH, or MgO?

N2

which of the following covalent compounds will have the strongest bond? N2, O2, F2, or H2O?

KP3

which of the following ionic compounds does NOT have balanced formula units? NaCl, MgO, ALS3, or KP3

ALP

which of the following ionic structures has balanced formula units? Na2Cl3, CaCl, ALP, or Li3O?

HCN

which of the following is a covalent compound? NaCl, HCN, KF, or CaCl2?

H20

which of the following molecules has a dipple (is polar covalent?) CH3, C2H4, CO2, or H2O?