An ion is an atom that has

• the same number of electrons as protons

• a different number of neutrons from protons

• a negative or positive charge

In a covalent bond, atoms ____

• share electrons

• of opposite charges attract each other

• share protons

• both become highly electronegative

• lose electrons

An atom with a net negative charge must have ____.

• more neutrons than protons

• more protons than electrons

• more electrons than protons

• more protons than neutrons

Look at the periodic table on the wall. How many electrons does carbon have in its outer shell?

• 2

• 4

• 6

• 8

Oxygen is atomic number 8. Based on this, how many covalent bonds does oxygen typically form?

• 1

• 2

• 4

• 8

How many electrons would sodium (Na) have to lose to be stable?

• 1

• 3

• 8

• 11

What type of bond gives water its adhesive and cohesive properties?

• The covalent bond between hydrogens

• The ionic bond between water and salts

• The hydrogen bonds between water molecules

• The nonpolar bonds between hydrogen and oxygen

Which of the following is true for an acid?

• It has a value above 7 on the pH scale

• It has a high concentration of OH- ions

• It has a value of 7 on the pH scale

• It has a high concentration of H+ ions