lewis and bohr diagrams

What element is this?

• Helium
• Hydrogen
• Argon
• Silver

Tags

NGSS.MS-PS1-1

How many electrons does potassium K contain? (click to see image)

• 19
• 39
• 20
• 40

Tags

NGSS.MS-PS1-1

What's a valence electron?

• electrons in the second energy level
• electrons in the outermost energy level
• the atomic number
• electrons in the first level

Tags

NGSS.MS-PS1-1

How many dots would a Lewis Dot structure of Helium have?

• 1
• 2
• 8
• 0

Tags

NGSS.HS-PS1-1

How many valence electrons are in Phosphorus?

• 15
• 4
• 5
• 31

Tags

NGSS.HS-PS1-1

?

• Lithium
• Boron
• Carbon
• Neon

Tags

NGSS.MS-PS1-1

?

• Helium
• Hydrogen
• Argon
• Silver

Tags

NGSS.MS-PS1-1

The number of protons an element has is its?

• Atomic mass

• Atomic number

• a.m.u

• Group

What is the the outermost shell with electrons?

• Shells

• Isotope

• Orbit

• Valence

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many electrons can go in the first energy level?

• 2

• 8

• 18

• 32