5 Written questions
5 Matching questions
- Covalent Bond
- Polar Covalent Bond
- Electron Shells
- Surface Tension
- a The attraction of a given atom for the electrons of a covalent bond.
- b An energy level representing the distance of an electron from the nucleus of an atom.
- c A covalent bond between atoms that differ in electronegativity. The shared electrons are pulled closer to the more electornegative atom, making it slightly negative and the other atom slightly positive.
- 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 A strong chemical bond in which two atoms share one or more pairs of outer-shell electrons.
5 Multiple choice questions
- Anything that occupies space and has mass.
- 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.
- A starting material in a chemical reaction.
5 True/False questions
Element → A subsctance that cannot be broken down to other substance by ordinary chemcial means.
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.
Aqueous Solution → A liquid that is a homogeneous mixture of two or more substances.
Solute → A compound resulting from the formation of ionic bonds; also called an ionic compound.
Ocean Acidification → Rain, snow or fog that is more acidic than pH 5.2.