Valence Electrons and Electron Dot Diagrams

What are the circles in a Bohr model of an atom that hold electrons called?

• Protons

• Neutrons

• Nuclei

• Energy levels or shells

Tags

NGSS.HS-PS1-2

How many electrons can the first energy level hold?

• One

• Ten

• Eight

• Two

What do we call the electrons in the outermost shell of an atom?

• Protons

• Neutrons

• Valence electrons

• Core electrons

How many valence electrons does helium have?

• 1

• 2

• 8

• 0

How many valence electrons does oxygen have?

• Six

• Five

• Four

• Seven

Tags

NGSS.MS-PS1-1