6.1-Organizing the Elements - 3

Which organization sets standards for chemistry and stands for International Union of Pure and Applied Chemistry?

• UNEP

• IUPAC

• WHO

• UNESCO

In what year did IUPAC propose a new system for labeling the groups in the periodic table from 1 through 18, left to right?

• 1990

• 2000

• 1985

• 1975

What are the three classes of elements?

• Metals, non-metals, and metalloids

• Alkali, transition, and halogens

• Noble gases, non-metals, and lanthanides

Which type of elements are most abundant in the periodic table?

• Metalloids

• Non-metals

• Gases

• Metals

Approximately what percentage of metals are generally good conductors of heat and electricity?

• 20%

• 50%

• 80%

• 95%

All metals are _______ at room temperature.

• Gas

• Solid

• Liquid

• Plasma

Which of the following are properties of metals?

• Brittle, poor conductors of heat and electricity

• Luster, malleable, and poor conductors of heat

• Luster, malleable, ductile, and good conductors of heat and electricity

Most non-metals are _______ at room temperature.

• Solid

• Liquid

• Gas

• Plasma

Sulphur and phosphorus, both non-metals, are generally in what state at room temperature?

• Gas

• Solid

• Liquid

• Plasma

Bromine, a non-metal, is typically in what state at room temperature?

• Gas

• Solid

• Liquid

• Plasma