Periodic Table

What is the periodic table?

• A table that represents all known chemical elements.

• A table that lists all known animals.

• A chart of all known planets.

• A list of all known countries.

How many known elements are there in the periodic table?

• 118

• 100

• 150

• 200

What is the atomic number of an element?

• The number of protons

• The number of electrons

• The number of neutrons

• The number of atoms

How many energy shells do elements in the 4th period have?

• 4

• 1

• 2

• 3

What are valence electrons?

• Valence electrons are electrons in the outermost shell of an atom

• Electrons in the innermost shell

• Protons in the nucleus

• Neutrons in the nucleus

Which group is known to have reactive metals?

• Group 5

• Group 1

• Group 3

• Group 7

What are the elements in Group 1 called?

• Noble gases

• Halogens

• Alkali metals

• Transition metals

What is a common property of alkali metals?

• High density

• Highly reactive

• Non-reactive

• Odorless

What is a property of noble gases?

• Highly reactive

• Flammable

• Non-reactive

• High density

Which group contains non-metals that are reactive?

• Group 1

• Group 2

• Group 7

• Group 8