Bell Ringer 12-1-23

What are valence electrons?

• Electrons in the innermost energy level (shell) of an atom

• Electrons in the middle energy levels (shells) of an atom

• Electrons in the outermost energy level (shell) of an atom

• Electrons in the nucleus of an atom

How many valence electrons does an atom of oxygen have?

• 6

• 8

• 2

• 4

What is the maximum number of electrons that can be present in the first energy level (shell) of an atom?

• 4

• 8

• 2

• 6

How many energy levels (shells) are there in an atom of sodium?

• 7

• 5

• 3

• 1

How many valence electrons does an atom of aluminum have?

• 10

• 5

• 7

• 3

What is the maximum number of electrons that can be present in the third energy level (shell) of an atom? [Hint: #e- = 2n^2, where n = shell number]

• 8

• 18

• 10

• 6

How many energy levels (shells) are there in an atom of lithium?

• 4

• 1

• 2

• 3

How many valence electrons does an atom of potassium have?

• 5

• 2

• 8

• 1

How many "valance electrons" are in chlorine?

• 7
• 2
• 17
• 8

Using the periodic table, the group of the element tells you how many ____________ an element has.

• Valence electrons

• Protons