Valence Electrons and Their Role in the Periodic Table

What are the circles in an atom that hold electrons called?

• Nuclei

• Energy levels or shells

• Neutrons

• Protons

How many electrons can the first energy level hold?

• Eight

• One

• Two

• Ten

What is the atomic number of hydrogen?

• One

• Two

• Four

• Three

How many electrons does a neutral lithium atom have?

• One

• Four

• Two

• Three

What is the term for the electrons in the outermost shell of an atom?

• Core electrons

• Protons

• Valence electrons

• Neutrons

How many valence electrons does beryllium have?

• Three

• Four

• Two

• One

What is the atomic number of magnesium?

• Eleven

• Thirteen

• Ten

• Twelve

How many valence electrons does carbon have?

• Three

• Five

• Four

• Two

How many valence electrons does fluorine have?

• Seven

• Five

• Six

• Eight

How many valence electrons does neon have?

• Nine

• Eight

• Seven

• Six