Valence Electrons Unit 5 – Bonding Mrs. Callender.

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Valence Electrons Unit 5 – Bonding Mrs. Callender

Transcript of Valence Electrons Unit 5 – Bonding Mrs. Callender.

Page 1: Valence Electrons Unit 5 – Bonding Mrs. Callender.

Valence ElectronsUnit 5 – Bonding

Mrs. Callender

Page 2: Valence Electrons Unit 5 – Bonding Mrs. Callender.

What are Valence Electrons and What are Their Uses?

Lesson Essential Question:

Page 3: Valence Electrons Unit 5 – Bonding Mrs. Callender.

Valence Electrons

They are electrons in the outermost shell.

They are used in bonding.

Page 4: Valence Electrons Unit 5 – Bonding Mrs. Callender.

Alkali Metals have one valence e-. (s1)

Alkaline Earth Metals have two valence e-s. (s2)

Boron Group or Group 13 has 3 valence e-s. (s2p1)

Carbon Group or Group 14 has 4 valence e-s. (s2p2)

Nitrogen Group or Group 15 has 5 valence e-s. (s2p3)

Chalcogen Group or Group 16 has 6 valence e-

s. (s2p4)Halogen Group or Group 17 has 7 valence e-s. (s2p5)

Noble Gases or Group 18 has 8 valence e-s. (s2p6) Exception: Helium which has two valence e-s since it is a s2.

Transition Metals or “d block” elements have 1 or 2 valence e-s.

Lanthanide and Actinide Series Elements or “f block” elements have 1 or 2 valence e-s.

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Dot DesignationsValence Electrons can be represented by Lewis Dot

Structures.1 valence e- 4 valence e-3 valence e-2 valence e-

7 valence e-6 valence e-5 valence e- 8 valence e-

X

X

XXX

X X X

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Dot Designations For Period 3Write the Lewis Dot Structures for the elements in

Period 3.1 valence e- 4 valence e-3 valence e-2 valence e-

7 valence e-6 valence e-5 valence e- 8 valence e-

Na

P

SiMg

S Cl Ar

Al


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