Skill Check- Valence electrons

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

How many valence electrons does carbon have?

• 4

• 5

• 6

• 7

Tags

NGSS.MS-PS1-1

USE THE PERIODIC TABLE

How many valence electrons does Phosphorus have?

• 31

• 5

• 15

• 4

Tags

NGSS.MS-PS1-1

How many valence electrons are in an atom of Ar?

• 2
• 8
• 4
• 1

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

• 7
• 6
• 4
• 1

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

• Number of protons

• Number of electrons

• Number of valence electrons

• Number of shells

Atoms with few valence electrons (1-3) tend to do what with them?

• Lose them

• Gain more

• Do nothing

Which 3 elements have 3 valence electrons?​ (a)   ​ (b)   ​ (c)   ​

• B

• Al

• Ga

• Be

• Ge

This could be the dot diagram of

• Mg

• Cl

• C

• O

Tags

NGSS.MS-PS1-1

Elements that have atoms with full valence shells in the ground state are in

• Group 1

• Group 2

• Group 17

• Group 18