Exam 11: The Chemical Elements

About 99% by mass of Earth's atmosphere is composed of the two elements

Give the formula, including the ionic charge, for each of the following polyatomic ions. a. hydroxide b. sulfate c. ammonium d. phosphate

Which of the following is not matter?

The molecular formula of "buckyball" is ______________.

The symbol for Erbium is

The major credit for the development of the periodic table goes to a scientist named ______________.

An example of a diatomic molecule of a compound is

In addition to those of Groups 1A and 2A, three common elements that form only one ion each are

The periodic table is most easily understood in terms of the ______________ configurations of the elements.

An electrically neutral particle composed of two or more atoms chemically combined is called a(n) ______________.

Take a cup of water, add sugar, and stir. Continue adding sugar and stirring until the sugar crystals no longer dissolve. Then apply heat to dissolve the remaining crystals. If the resulting solution is allowed to slowly cool, the solution is said to be

The second period of the periodic table is composed of ______________ (how many?) elements.

The symbol for carbon is

Diamond and graphite are

A solution in which more of the solute could be dissolved at the same temperature is called a(n) ______________ solution.

Which element is used in safety flares and fireworks because it burns so brightly?

Give the common ionic charge for each of the following elements, and classify each as a metal or a nonmetal. ​ ​

The formula for sulfuric acid is _________________.

How many valence electrons do the Group 6A elements have?

The identity of an atom is determined by its number of