Ch. 1 Introduction to Chemistry

What is used to represent an element?

• Chemical Symbol
• Subscript
• Chemical Formula
• Compound

What is the name for a substance that contains two or more elements?

• Heterogeneous
• Homogeneous
• Chemical Formula
• Compound

What is a combination of symbols that represent a compound?

• Chemical Symbol
• Subscript
• Chemical Formula
• Compound

What tells you the number of atoms of each element in a formula?

• Chemical Symbol
• Subscript
• Chemical Formula
• Compound

What type of mixture has a composition that is the same throughout?

• Compound
• Homogeneous
• Heterogenerous
• Subscript

Which of the following is true of most metals?

• They are poor conductors of electricity
• They are brittle
• The are dull and not shiny
• The are good conductors of heat

What are the three subatomic particles that make up an atom?

• electrons, protons, and nuclei
• elements, protons, and electrons
• protons, neutrons, and nuclei
• protons, neutrons, and electrons

What do the dots in a Dot Diagram represent?

• Protons
• Outer Electrons (valence electrons)
• Atomic Mass
• The structure of the nucleus

What is the maximum number of electrons in the second energy level of an atom?

• two
• four
• eight
• ten

What is the group number for elements that have a stable (Full) number of electrons in their outer energy level?

• Group 18
• Group 17
• Group 2
• Group 1