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3.1 Compounds.

Published bySuhendra Kartawijaya Modified over 6 years ago

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Presentation on theme: "3.1 Compounds."— Presentation transcript:

1 3.1 Compounds

2 A compound = a pure substance made up of two or more kinds of elements that are chemically combined

3 A chemical bond = a link between 2 or more atoms that hold the atoms together

4 Two Types of Chemical Bonds
SHARING ELECTRONS DONATING ELECTRONS Covalent Bonds Ionic Bonds

5 Covalent Bonds are found in Covalent Compounds
Atoms combine by sharing VALENCE ELECTRONS Covalent compounds are also called: MOLECULES ONLY Non– Metal + Non – Metal combine to form COVALENT COMPOUNDS (Molecules)!!

6 Valence Electrons are shared between atoms
Covalent Compounds Valence Electrons are shared between atoms + hydrogen fluoride hydrogen fluorine electrons are shared

7 IONS Atom or a group of atoms with net negative or positive charge
POSITIVELY CHARGED ION = NEGATIVELY CHARGED ION = CATION ANION

8 IONIC COMPOUNDS Formed by an attraction of positively charged ion and negatively charged ion Chemical formula NaCl

9 Formed when electron(s) are transferred from a metal to a non - metal
IONIC COMPOUNDS Formed when electron(s) are transferred from a metal to a non - metal Chemical formula NaCl

10 Cations and Anions are attracted to each other  IONIC BONDING
NaCl

11 Attraction between cations and anions
IONIC COMPOUNDS Attraction between cations and anions

12 Attraction between cations and anions
IONIC COMPOUNDS Attraction between cations and anions

13 Attraction between cations and anions
IONIC COMPOUNDS Attraction between cations and anions

14 Exist as a solid in the form of an IONIC LATTICE
IONIC COMPOUNDS Exist as a solid in the form of an IONIC LATTICE IONIC LATTICE is a repeating pattern of positive (cations) and negative (anions) ions

15 READING CHECK Page 79

16 BLM 1 – 30 Chemical Bonds Concept map

17 Anatomy of a Chemical Formula

18 Anatomy of a Chemical Formula
How many atoms of each element in each of the formulas? CO2 CaCl2 Fe2O3 How many CaCl2? How many calcium atoms? How many chlorine atoms? How many Fe2O3? How many iron atoms? How many oxygen atoms? How many CO2? How many carbon atoms? How many oxygen atoms?

19 BLM

20 Polyatomic Ions COVALENT and IONIC COMPOUNDS can be found together in the same compounds

21 POLYATOMIC means “many” “atoms”
Polyatomic Ions POLYATOMIC means “many” “atoms”

22 READING CHECK Page 80

23 Making copper(II)chloride

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