5 Written questions
5 Matching questions
- Surface Tension
- Covalent Bond
- What 4 elements make up about 96% of living matter?
- a The smallest unit of matter that retains the properties of an element.
- b A liquid that is a homogeneous mixture of two or more substances.
- c A strong chemical bond in which two atoms share one or more pairs of outer-shell electrons.
- d A measure of how difficult it is to stretch or break the surface of a liquid. Water has a high surface tension because of the hydrogen bonding of surface molecules.
- e Oxygen, carbon, hydrogen, and nitrogen.
5 Multiple choice questions
- The attraction of a given atom for the electrons of a covalent bond.
- An atom or group of atoms that has gained or lost one or more electrongs, thus acquiring a charge.
- An ending material in a chemical reaction.
- Two or more atoms held together by covalent bonds.
- Rain, snow or fog that is more acidic than pH 5.2.
5 True/False questions
Salt → A compound resulting from the formation of ionic bonds; also called an ionic compound.
pH Scale → A scale we used to describe how acidic or basic a solution is. The scale ranges from 0-14, 0 being the most acidic and 14 being the most basic. 7 is neutral (pure water)
Isotopes → One of several atomic forms of an element, each with teh same number of protons but different number of neutrons.
Aqueous Solution → A solution in which water is the solvent.
Hydrogen Bonds → A strong chemical bond in which two atoms share one or more pairs of outer-shell electrons.