Exam 11: The Chemical Elements

O₃ and O₂ are the two ______________ of the element oxygen.

The alkali metals have ______________ valence electron(s).

Homogeneous mixtures are also called ______________.

In a supersaturated solution,

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

Atoms of which group of elements have seven electrons in the outer shell?

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

In a given period,the element of Group ______________ has the lowest ionization energy.

A cola drink is a good example of

The major credit for the development of the periodic table goes to

A bubble-producing soda is an example of

A chocolate chip cookie is a good example of

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

Over 99.9% of dry air at sea level is composed of the gases N₂,O₂,and ______________.

Which of the following Period 4 elements has the largest atom?

Give the chemical symbol for each element. boron ____________________ lead______________________ copper___________________ krypton______________________

The symbol for Erbium is

The pale-green,gaseous element named ______________ was used as a poisonous gas in World War I.

Nearly 100% by mass of Earth's core is composed of the two elements

Diamond and graphite are