5 Written questions
5 Matching questions
- Chemical Bonds
- Evaporative Cooling
- Polar Molecule
- a A molecule containing polar covalent bonds and having an unequal distribution of charges.
- b A subatomic particle with a single negative electrical charge. One or more electrons move around the nuclues of an atom.
- c An atom or group of atoms that has gained or lost one or more electrongs, thus acquiring a charge.
- d An attraction between two atoms resulting from a sharing of outer-shell electrons or the presence of opposite charges on the atoms. The bonded atoms gain complete outer electron shells.
- e occurs because the molecules with the greates energy leave.
5 Multiple choice questions
- A substance that decreases the hydrogen ion concentration in a solution. 14 is a strong base on the pH scale.
- Measures the intensity of heat.
- The dissolving agent of a solution. Water is the most versatile solvent known.
- Oxygen, carbon, hydrogen, and nitrogen.
5 True/False questions
Buffers → A chemical substance that resists changes in pH by accepting hydrogen ions from or donating hydrogen ions to solutions.
substance that minimize changes in pH.
Isotopes → A substance that is dissolved in a solution.
First shell of an atom can contain how many electrons? → 2
Compound → Two or more atoms held together by covalent bonds.
Aqueous Solution → A solution in which water is the solvent.