DOL 10/10/23 Bohr Model

How many electrons do the first four energy levels/shells HOLD?

• 2, 8, 8 (can really hold 18), 32

• 2, 8, 18, 18, 32

• 2, 8, 6, 32

Which of the following is the correct number of protons, neutrons, and electrons for an atom of phosphorus?

• protons = 15
  neutrons = 15
  electrons = 15
• protons = 15

  neutrons = 16

  electrons = 15

• protons = 15
  neutrons = 16
  electrons = 16
• protons = 16
  neutrons = 15
  electrons = 16

Name this element.

(a)  

• Neon

• Magnesium

• Sodium
• Manganese

Which scientist's atomic model are we using today, to represent atoms? He believed that electrons traveled around the nucleus in definite paths. You learned abouthis in class today.

(a)  

• Democritus 
• J. J. Thomson 
• Niels Bohr
• Rutherford

What two numbers are written in the nucleus of a Bohr model? ​ (a)  

• electrons and protons
• nucleus and neutrons
• protons and nucleus
• protons and electrons
• protons and neutrons

What are some other names for energy levels? Check all that apply.

• Shells

• Orbitals

• Nucleus

• None of these

• Subatomic particles

What are valence electrons?

• All the electrons shown.

• Only the outermost electrons.

• Electrons closest to the nucleus.

• Protons, neutrons and electrons in the electron cloud.