Electron dot diagram, covalent

What is the difference between elements and compounds?

• they are the same

• elements make up compounds

• compounds make up elements

• compounds are made of the same type of atoms while elements are mad up of two or more types of atoms

If an atom gains an electron, what charge will it have?

• positive

• negative

• neutral

What are valence electrons?

• electrons that are in the electron cloud

• all the electrons in an atom

• electrons in outer shell of an atom

How many total electrons can the 2nd shell or energy level hold?

• 1

• 2

• 8

• 18

What happens to the valence electrons of an atom when it is a covalent bond?

• transfers electrons

• shares electrons

• does nothing

On the periodic table, carbon is in group 14, period 2. How many valence electrons does carbon have?

• 6

• 14

• 2

• 4

A pure substance that contains 2 or more elements that are chemically bonded.

• an atom

• an ionic bond

• organic

• a compound

This type of bond is when atoms share electrons.

• ionic

• metallic

• covalent

• polar

Dot diagrams represent ____.

• outer shell electrons

• protons

• neutrons

• all electrons

What group will rarely form compounds because they are stable atoms?

• 18

• 1

• 2

• 17