bellringer: ionic bonds 1.what is the daily learning target? 2.in an ionic bond, explain what...

Bellringer: Ionic Bonds

1. What is the daily learning target?

2. In an ionic bond, explain what happens to the electrons?

3. In your own words, explain how to name an ionic bond.

Homework Quiz

On a scrap sheet:

1. Write the Lewis Diagrams for Sodium (Na) and Chlorine (Cl)

2. Draw an arrow showing the transfer of the electron when the two elements bond

3. Write the chemical formula for the bond

4. Write the name for the bond

PART II

CovalentBonds

LET’SFIRSTREVIEWIONICBONDING

In an IONIC bond,electrons are lost or gained,resulting in the formation of IONS

in ionic compounds.

FK

FK+ _

The compound potassium fluorideconsists of potassium (K+) ions

and fluoride (F-) ions

FK+ _

The ionic bond is the attractionbetween the positive K+ ion

and the negative F- ion

Sowhatarecovalentbonds?

In covalent bonding,atoms still want to achievea noble gas configuration(the octet rule).


But rather than losing or gainingelectrons, a nonmetal willnow share one or more electrons withanother nonmetal.


But rather than losing or gainingelectrons, a nonmetal willnow share one or more electrons withanother nonmetal.

The shared electron pairis called a bonding pair

Cl2

Chlorineforms

acovalent

bondwithitself

ClClHowwilltwochlorineatomsreact?

ClClEach chlorine atom wants to gain one electron to achieve an octet

ClClNeither atom will give up an electron –chlorine is highly electronegative.

What’s the solution – what can theydo to achieve an octet?

Cl Cloctet

Cl Cl

circle the electrons foreach atom that completestheir octets

octet

Cl Cl


The octet is achieved byeach atom sharing theelectron pair in the middle

Cl Cl


This is the bonding pair

Cl Cl


It is a single bonding pair

Cl Cl


It is called a SINGLE BOND

Cl Cl


Single bonds are abbreviatedwith a dash

Cl Cl


This is the chlorine molecule,

Cl2

O2

Oxygen is also one of the diatomic molecules

How will two oxygen atoms bond?

OO

OOEach atom has two unpaired electrons

Oxygen atoms are highly electronegative.

So both atoms want to gain two electrons.

OO

OOBoth electron pairs are shared.

6 valence electronsplus 2 shared electrons

= full octet

OO

two bonding pairs,

OOmaking a double bond

OO=For convenience, the double bond

can be shown as two dashes.

OO

OO=This is the oxygen molecule,

O2

this is so

cool!!

1. In a covalent bond,

A. Metals lose electrons and nonmetals gain electrons

B. The electrons are all lost to metals.

C. Nonmetals share electrons.

D. Metals steal all the electrons from nonmetals.

[Default][MC Any][MC All]

2. In order to satisfy the octet rule, you must have how may electrons in the outer shell?

A. 8

B. 2

C. 72

D. 18[Default][MC Any][MC All]

3. What kind of bond is formed when only two electrons are

shared (hint: Cl2)?

A. Double Bond

B. Triple Bond

C. James Bond

D. Single Bond[Default][MC Any][MC All]

4. What kind of bond is formed, when you have two bonding pairs

of electrons (hint: O2)?A. Double Bond

B. Triple Bond

C. James Bond

D. Single Bond[Default][MC Any][MC All]

5. In an ionic bond,

A. Electrons are shared by nonmetals.

B. Electrons are lost or gained, resulting in the formation of ions in ionic compounds.

C. Metals gain electrons from nonmetals.

D. Nonmetals lose electrons to metals.[Default][MC Any][MC All]

olar MoleculesPOLAR MOLECULES

Non-Polar

bellringer: ionic bonds 1.what is the daily learning target? 2.in an ionic bond, explain what...

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