Valence electrons and Periodic Table

What are valence electrons?

• The total number of electrons in an atom

• The number of electrons in the outermost shell

• The number of electrons in the second shell

• The number of protons in the outermost shell

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many valence electrons does carbon have?

• 4

• 5

• 6

• 7

Tags

NGSS.HS-PS1-1

USE THE PERIODIC TABLE

How many valence electrons does Phosphorus have?

• 31

• 5

• 15

• 4

Tags

NGSS.HS-PS1-1

How many valence electrons are in an atom of Ar?

• 2
• 8
• 4
• 1

Tags

NGSS.HS-PS1-1

How many valence electrons are found in atoms of group 1?

• 7
• 6
• 4
• 1

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The period that an element is in, tells you what?

• Number of protons

• Number of electrons

• Number of valence electrons

• Number of energy levels (shells)

This could be the dot diagram of

• Mg

• Cl

• C

• O

Tags

NGSS.HS-PS1-1

Is this correct way to draw the Lewis Dot Structure for Carbon?

• Yes

• No, too many electrons

• No, not enough electrons

• No, dots are in wrong places

Tags

NGSS.HS-PS1-1

Is this the correct Lewis Dot Structure for Boron?

• Yes

• No, missing electrons

• No, too many electrons

• No, dots are in wrong place.

Tags

NGSS.HS-PS1-1

This is a correct dot diagram for neon (Ne)

• true

• false

Tags

NGSS.HS-PS1-1