Chemistry - Unit 4 - Bonding

Types of bonds.

What are ionic bonds and are they conductors?

A bond between a metal and a nonmetal where one atom gives up one or more electrons to another atom. They conduct electricity when dissolved.

What are covalent bonds, molecular compounds, are they conductors and what is their goal?

A bond between two, or more, nonmetals where two atoms share a pair of electrons. These bonds are not conductive in any state and their goal is to form a full configuration (octet rule).

What are metallic bonds?

A bond between two metals where electrons are distributed evenly to create a sea of electrons which allows electrons to move easily among the atom.

Is KCl a ionic or molecular bond?

Ionic.

Is PO₂ a ionic or molecular bond?

Molecular.

Is Al₂S₃ a ionic or covalent bond?

Covalent.

Is H₂ a covalent or ionic bond?

Covalent.

Do metallic bonds conduct electricity?

Yes, they conduct electricity as solids.

Do covalent bond conduct electricity?

No, they do not conduct electricity in any form.

Which type of bond has the highest melting point?

Metallic.

Which bond has a low melting point?

Covalent.

What bond has a high melting point, but does not have the highest melting point?

Ionic.

Are metal ions positively or negatively charged? Why?

They are positively charged because they lose electrons

are nonmetal ions positively or negatively charged? Why?

They are negatively charged because they gain electrons.

How many electrons are involved in a single bond?

Two.

How many electrons are involved in a triple bond?

Six.

How do you know the number of valence electrons that an element will have?

Look at the last digit of the group number. (Ignore tranistion elements)

All elements want to meet the octet rule except for Boron and Hydrogen, how many electrons do they want to fill their outer shell?

Boron wants six electrons and Hydrogen wants two.