| A | B |
|---|
| T or F: Covalent bonds are made by sharing electrons between two atoms. | T |
| T or F: A carbonate ion (CO3 -2) must gain three electrons from other substances to be stable. | F |
| T or F: A trigonal shaped molecule (ex. CH2O) will show 120 degree bond angles among its two single bonds and one double covalent bond. | T |
| T or F: In Cl2 the electrons are shared equally because both chlorine atoms have the same electronegativity. | T |
| T or F: Chlorite has a greater number of oxygen atoms than chlorate. | F |
| T or F: Acetate and cyanide both have a minus one charge on their ion. | T |
| The SiO2 has which of the following molecular shapes? a. tetrahedral b. pyramidal c. bent d. linear e. none of the above | linear |
| The molecular shape that has a 90 degree bond angle is which of the following? a. tetrahedral, b. pyramidal, c. bent, d. linear, e. none of the above | none of the above |
| The chemical formula for aluminum sulfate is which of the following? a. Al3 (SO4)2 b. Al2S3 c. Al2(SO3)4 d. Al2 (SO4)3 e. none of the above | Al2 (SO4) 3 |
| ____ ions are formed when a group of atoms gain or lose electrons. | Polyatomic |
| The chemical formulas for potassium chromate and silver nitrate are ____and ____ respectively. | K2CrO4 & AgNO3 |
| The chemical formula for thallium (III) acetate is ___ | Tl(C2H3O2)3 |
| Covalent bond electron pairs tend to repel one another, due to the fact that they have the same type of ____. | electrical charge |
| NO3 and NO2 are naturally occurring inorganic ions that are part of the nitrogen cycle. Microbial action in soil or water decomposes wastes containing organic nitrogen into ammonia, which is then oxidized into the two inorganic ions. These ions provide the major source of natural fertilizers in the terrestrial ecosystem. ____ and ____are the chemical names of NO3 and NO2 respectively. | nitrate and nitrite |
| A purely covalent bond is a covalent bond in which the electrons are shared ____between the atoms involved. | equally |
| Phosphate is used in cellular membranes and is the linkage molecule in the backbone of DNA. The chemical formula for phosphate is ____. | PO4 -3 |
