| A | B |
|---|
| T or F: A polyatomic ion must contain neither a charge on the molecule nor a covalent bond between the component atoms. | F |
| T or F: Molecules generally have a three-dimensional structure to them. | T |
| T or F: Covalent bonds are made by sharing electrons between two atoms. | T |
| T or F: In nature, several atoms can come together and gain or lose electrons as a group. | T |
| T or F: If molecules having four covalent bonds (ex. CH 4) were flat, the largest angle between the chemical bonds would be 45 degrees. | F |
| T or F: To determine a three-dimensional molecular shape, one must look at electron groups that surround the central atom. | T |
| T or F: A carbonate ion (CO3 -2) must gain three electrons from other substances to be stable. | F |
| T or F: If electron pairs repel each other, they will try to move as far apart as possible from each other. | T |
| T or F: In the ammonia molecule (NH3), there are three non-bonding electron pairs. | T |
| T or F: A trigonal shaped molecule (ex. CH 2 O) will show 120 degree bond angles among its two single bonds and one double covalent bond. | T |
| T or F: Polyatomic molecules cannot lose electrons to form positively charged ions. | F |
| T or F: In Cl2 the electrons are shared equally because both chlorine atoms have the same electronegativity. | T |
| T or F: A linear shaped molecule will have a bond angle of 270 degrees. | F |
| T or F: The chemical names of SO 4 -2 and SO 3 -2, are sulfate and sulfite, respectively. | T |
| T or F: Chlorite has a greater number of oxygen atoms than chlorate. | F |
| T or F: Polar covalent compounds can dissolve any other substance and are thus considered "universal solvents." | F |
| T or F: Because the bromine atom has greater electronegativity than the hydrogen atom, the electrons between Br and H are shared unequally in the HBr molecule. | T |
| T or F: The pyramidal shaped molecule is just a tetrahedron with one leg removed: while a trigonal shaped molecule is a tetrahedron with two legs removed. | F |
| T or F: Acetate and cyanide both have a minus one charge on their ion. | T |
| T or F: the OH molecule creates a stable OH polyatomic ion by gaining an electron from a metal or from a hydrogen atom. | T |
