Covalent vs. Ionic bonds

What is the number of valence electrons that is considered as stable

• 8

• 2

• 19

How many valence electrons does oxygen have?

• 8

• 2

• 6

For O₂ the electrons between the two O atoms are

• shared.

• gained.

• lost.

How many electrons does a neutral atom of Na have?

• 11

• 23

• 12

How many VALENCE electrons does Na have?

• 2

• 1

• 11

How many VALENCE electrons does Cl have?

• 10

• 17

• 7

Which atom will lose an electron?

• Na

• Cl

• Both Na and Cl

After the transfer of electrons, how many valence electrons do Na and Cl have?

• Na has more valence electrons than Cl.

• Na and Cl have 8 valence electrons each.

• Cl has more valence electrons than Na.