Bohr Models Dot Diagrams Atoms Ions Isotopes

What element is this?

• Helium
• Hydrogen
• Argon
• Silver

Tags

NGSS.HS-PS1-1

How many total electrons does Si contain? (click to see image)

• 14
• 28
• 4
• 0

Tags

NGSS.HS-PS1-1

How many total electrons does an ion of potassium K⁺ contain? (click to see image)

• 18

• 20

• 18

• 40

Tags

NGSS.HS-PS1-1

What element is represented in this Bohr Model? 

• Carbon
• Hydrogen
• Aluminum
• Lithium

Tags

NGSS.HS-PS1-1

What are valence electrons?

• electrons in the second energy level
• electrons in the outermost energy level
• all electrons
• electrons in the first level

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many valence electrons are in Phosphorus?

• 15
• 4
• 5
• 31

Tags

NGSS.HS-PS1-1

How many electrons are in the outer shell of Sodium (Na)?

• 3
• 1
• 2
• 4

Tags

NGSS.HS-PS1-1

What element?

• Boron
• Carbon
• Nitrogen
• Lithium

Tags

NGSS.HS-PS1-1

What element?

• Lithium
• Boron
• Carbon
• Neon

Tags

NGSS.HS-PS1-1

What element?

• Beryllium
• Boron
• Barium
• Bromine

Tags

NGSS.HS-PS1-1