Bohr Model and Valence Electrons

How many protons are in an atom of magnesium?

• 3
• 12
• 24
• 40

How many electrons can the first energy level hold?

• 2
• 4
• 6
• 8

How many energy levels are found in Period 2?

• 1
• 2
• 3
• 4

Which element has the same number of electrons in the outermost energy level as lithium?

• Hydrogen
• Beryllium 
• Carbon
• Magnesium

Which element has the same number of energy levels as nitrogen?

• Boron
• Chlorine
• Phosphorus
• Silicon

Which element does this atom represent?

• Carbon
• Lithium
• Nitrogen
• Boron

Tags

NGSS.MS-PS1-1

Which element does this atom represent?

• Helium
• Boron
• Nitrogen
• Carbon

Tags

NGSS.MS-PS1-1

Which element does the atom represent?

• Hydrogen
• Helium
• Lithium
• Boron

Tags

NGSS.MS-PS1-1

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

Tags

NGSS.MS-PS1-1

What atom is represented by 35 protons, 45 neutrons, and 35 electrons?

• Mercury
• Bromine
• Rhodium
• Ytterbium

Tags

NGSS.MS-PS1-1