Launch: 10/26 Grab your binder and immediately take a seat Place homework (Mind Map) on desk Why do atoms form bonds? What subatomic particles are involved in bonding? Label the following as metal, semimetal, or nonmetal i. Si ii. Al iii. H iv. Ca v.Ni

Grab your binder and immediately take a seat

Place homework (Mind Map) on desk

Why do atoms form bonds?

What subatomic particles are involved in bonding?

Label the following as metal, semimetal, or nonmetal

i. Si ii. Al iii. H iv. Ca v.Ni

What are the 3 types of chemical bonds? – Part II Mr. Heffner 10/26/09

What is a chemical compound? A chemical compound is… a substance made of two or more atoms held together by a chemical bond a.k.a. molecule just means “stuff”

A chemical compound is…

a substance made of two or more atoms held together by a chemical bond

a.k.a. molecule

What is a chemical compound? Two ways to represent compounds Drawing Chemical formula 2 Hydrogen atoms 1 Oxygen atom Chemical Bond H 2 O Subscript H H O

Two ways to represent compounds

Drawing

Chemical formula

2 Hydrogen atoms

1 Oxygen atom

What is a chemical compound? Two ways to represent compounds Drawing Chemical formula 1 sodium atom 1 oxygen atom 1 hydrogen atom NaOH capital letter = different element Na H O

Two ways to represent compounds

Drawing

Chemical formula

1 sodium atom

1 oxygen atom

1 hydrogen atom

What are the 3 types of bonds? Ionic Electrons are exchanged (or transferred) Between a metal and a nonmetal Covalent Electrons are shared Between a nonmetal and a nonmetal Metallic Electrons are shared Between a metal and a metal Which electrons?

Ionic

Electrons are exchanged (or transferred)

Between a metal and a nonmetal

Covalent

Electrons are shared

Between a nonmetal and a nonmetal

Metallic

Electrons are shared

Between a metal and a metal

Is it ionic, covalent, or metallic? Example: LiCl Step #1: identify the atoms Li = lithium Cl = chlorine

Example: LiCl

Step #1: identify the atoms

Li = lithium

Cl = chlorine

What are the 3 main categories? Example: LiCl Step #2: metal or nonmetal? Metals Semimetals Nonmetals

Example: LiCl

Step #2: metal or nonmetal?

Is it ionic, covalent, or metallic? Example: LiCl Step #3: match the combination a metal (Li) and a nonmetal (Cl) Ionic Li Cl

Example: LiCl

Step #3: match the combination

a metal (Li) and a nonmetal (Cl)

Is it ionic, covalent, or metallic? Example: H 2 O Step #1: identify the atoms H = hydrogen (X2) O = oxygen

Example: H 2 O

Step #1: identify the atoms

H = hydrogen (X2)

O = oxygen

What are the 3 main categories? Example: H 2 O Step #2: metal or nonmetal? Metals Semimetals Nonmetals

Example: H 2 O

Step #2: metal or nonmetal?

Is it ionic, covalent, or metallic? Example: H 2 O Step #3: match the combination two nonmetals (H) and a nonmetal (O) Covalent H H O

Example: H 2 O

Step #3: match the combination

two nonmetals (H) and a nonmetal (O)

Practice Questions Practice Questions Worksheet Answer in complete sentences!

Practice Questions Worksheet

Answer in complete sentences!

Benchmark Scoring This does not count for a grade! Switch papers with your partner Transpose scores onto bubble sheet Hypothesis X 2 = 4 Method X 2 = 8 Diagram X 2 = 4 Table of results X 2 = 4 Longer report X 2 = 4 Conclusion X 2 = 4 If it is a decimal, round down after doubling

This does not count for a grade!

Switch papers with your partner

Transpose scores onto bubble sheet

Hypothesis X 2 = 4

Method X 2 = 8

Diagram X 2 = 4

Table of results X 2 = 4

Longer report X 2 = 4

Conclusion X 2 = 4

If it is a decimal, round down after doubling

Exit Slip In the chemical compound SOCl 2 there is/are two chlorine atoms and two sulfur atoms. only one atom of each element. the element solarium (So). one sulfur atom, two chlorine atoms, and one oxygen atom.

In the chemical compound SOCl 2 there is/are

two chlorine atoms and two sulfur atoms.

only one atom of each element.

the element solarium (So).

one sulfur atom, two chlorine atoms, and one oxygen atom.

Exit Slip In covalent bonding, valence electrons are exchanged. only metals interact with other metals. valence electrons are shared atoms become less stable due to the octet rule.

In covalent bonding,

valence electrons are exchanged.

only metals interact with other metals.

valence electrons are shared

atoms become less stable due to the octet rule.

Exit Slip Ionic bonds form between which two types of elements? alkali and alkaline earth metals halogens and other halogens metals and nonmetals nonmetals and other nonmetals

Ionic bonds form between which two types of elements?

alkali and alkaline earth metals

halogens and other halogens

metals and nonmetals

nonmetals and other nonmetals

Exit Slip What type of compound is H 2 SO 4 ? metallic covalent ionic none of the above

What type of compound is H 2 SO 4 ?

metallic

covalent

ionic

none of the above

Exit Slip Which of the following is an example of an ionic compound? AlCl 3 CCl 4 O 2 Zn 2+

Which of the following is an example of an ionic compound?

AlCl 3

CCl 4

O 2

Zn 2+

Homework Finish practice questions

Finish practice questions