Bonding Flashcards
Compound ion formula for a: Nitrate; Carbonate; Sulfate and Ammonium.
NO3- ; CO3 2- ; SO4 2- and NH4 +.
How are ions formed?
When electrons are transferred from one atom to another.
What is an ionic bond?
An ionic bond is electrostatic attraction between two oppositely charged ions.
What is an ionic crystal?
It is a giant lattice of ions.
What is a giant lattice?
A regular structure that has the same basic unit repeated over and over again.
Do ionic compounds have electrical conductivity?
When they are molten or dissolved in water they can as their free ions can carry the electrical charge. However, when solid they cannot as the strong ionic bonds hold the ions in place.
Explain the trends of melting and boiling points in ionic compounds.
They have generally high melting and boiling points as the electrostatic force require a lot of energy to overcome.
Why are ionic compounds usually double in water?
Water is a polar molecule, part of it has a slight mega tie charge and part of it has a slight positive charge. The water molecules pull the ions away from the lattice causing it to dissolve.
What bond are molecules help together by?
They are held together by strong covalent bonds.
When do double or triple bonds form?
When an atom are sharing more that one pair of electrons.
What is dative covalent bonding?
It is when an atom provides both of the shared electrons.
How is can dative bonding be shown in a stick diagram?
By using an arrow.
Why aren’t covalent compounds electrically conductive?
They have no free ions or electrons to carry the charge.
Why do covalent compounds have low boiling and melting points?
This is due to weak forces between the molecules even though they have strong attraction within molecules.
Can covalent compounds dissolve in water?
Some do, it depends on their polarity.
