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Chapter 2 The Material World

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Presentation on theme: "Chapter 2 The Material World"— Presentation transcript:

1 Chapter 2 The Material World
Molecules Chapter 2 The Material World

2 Forming Covalent Compounds

3 What are covalent compounds?
Covalent compounds are compounds formed between two non-metals or groups of nonmetals Electrons are NOT gained or lost →Electrons are shared

4 Examples: Covalent Bonds
Draw the Lewis dot diagram to show the bond between carbon and hydrogen. H H C H H

5 Naming Covalent Compounds
RULE: Prefix-1st Non-Metal + Prefix-2nd Non-Metal (-ide) Prefix: 1-mono 2-di 3-tri 4-tetra 5-penta 6-hexa Examples: H2O Dihydrogen monoxide CCl4  Carbon tetrachloride SCl2  Sulfur dichloride P2S3  Diphosphorus trisulfide

6 I Have No Bright Or Clever Friends
Diatomic Gases There are 7 gases that are always found as a pair of atoms bonded with themselves - diatomic = 2 atoms I Have No Bright Or Clever Friends

7 O O I I N N H H F2, Cl2, Br2, I2 O2 N2 H2 Diatomic Gases Double bond
Triple bond


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