Exam 11: The Chemical Elements

The periodic law states that the properties of elements are periodic functions of their atomic

Earth's atmosphere is 78% ______________.

For an atom of ₁₂Mg,the number of shells containing electrons is ______________.

Which of the five major divisions of chemistry deals exclusively with carbon compounds?

Generally,the solubility of gases in liquids increases with

The element potassium should produce compounds most similar to those of

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

A solid solution of two or more metals is called a(n)______________.

The lesser amount of a substance in a solution is generally called the

Use the periodic table to find the atomic number,number of protons,number of electrons,and number of valence electrons for each of the following elements. a. barium b. tin c. phosphorus

The amount of energy necessary to remove an electron from an atom is called that atom's ______________.

The smaller portion of a solution is generally called the

The symbol for potassium is

The electrons in the outermost shell are called ______________ electrons.

The horizontal rows of the periodic table are called ______________.

A compound of which element is used as a diet supplement to prevent thyroid problems?

An atom of chlorine has how many valence electrons?

The element ______________ is a purple-black solid that sublimes readily.

The greater amount of substance in a solution is generally called the

What was the nationality of the first persons who we know speculated about "elements"?