Covalent Bonding

Vocabulary

100

a molecule in which one end of the molecule is slightly positive, while the other end is slightly negative because of uneven sharing of electron pairs.

Polar

200

A molecule in which the atoms share electrons equally.

nonpolar

300

molecules composed of only two atoms, of the same chemical elements. Bonus point if you can also give the mnemonic and elements. 

Diatomic molecule

400

a bond formed by sharing one or more pairs of valence electrons

Covalent Bond

500

Two or more nonmetals sharing one or more electron pairs.

Covalent compound

Basic covalent bonding

100

write the electron dot diagram for H2.

What is H:H

200

write the structural formula for H2.

What is H-H

300

What is the name for CBr₄

Carbon teterabromide

400

How many electrons are represented with the "-' symbol when writing the structural formula?

two electrons

500

Electrons are ____ in a covalent bond

Shared

More complex Ionic Bonds

100

Write the electron dot formula for sulfur dichloride

What is Cl:S:Cl

200

Write the Structural formula for H2Se

What is H-Se-H 

300

How do I know how many bonds Se can form?

What is by number of valence electrons. Se has 6 valence electrons so it is looking to fill two spots.

400

Write the electron dot diagram for GeS2

What is 

S::Ge::S 

500

Write the structural formula CO₂

What is O=C=O 

More covalent bonds

100

What is the octet rule and how does it dictate covalent bonding?

What is an atoms desire to have a full electron shell 2-8-8

200

Write the structural formula for PCl3

P is in the middle with a Cl on 3 out of 4 sides. Between each P and Cl there is a single bond. There is one unbonded pair of electrons on the P.

300

What is the chemical name for I₂

What is Iodine. 

400

Name 3 properties of covalent bonds

What are low boiling points, low melting points, good insulators. 

500

Why can't phosphorus form 4 bonds

what is P valence electron shell only holds 8 valence electrons and P already has 5, so it can only form 3 bonds. If it formed 4 bonds it would have 9 valence electrons.

General covalent Bond Questions

100

If there were two bonds connecting a pair of elements (ie. O2) , what do we call the bonds?

What are double covalent bonds

200

How do we decide how many electrons to place on the dot diagram?

What is the number of valence electrons?

300

What would we call a bond with three lines together in the structural formula?

What are triple covalent bonds?

400

Which bond is stronger, Covalent or Ionic?

What is Ionic bonds

500

Covalent compounds are made up of two ..(nonmetals,metals,metalloids)?

What are nonmetals?