Covalent Bonding Flashcards
What are covalent bonds?
Covalent bonds occur when atoms share electrons.
Between which types of atoms do covalent bonds typically occur?
Non-metal atoms.
What forms a single covalent bond?
Each shared pair of electrons.
How are double and triple covalent bonds formed?
By two or three shared pairs of electrons respectively.
In covalent bonding, how many electrons does each atom contribute to the shared pair?
At least one electron.
What are the two types of structures that covalently bonded substances can exist as?
Simple molecules or giant structures.
What are the melting and boiling points of simple molecular substances?
Low melting and boiling points.
Why do simple molecular substances have low melting and boiling points?
Due to the relatively weak forces between molecules.
What are giant covalent structures?
Structures like diamond and silicon dioxide with very high melting and boiling points.
Why do giant covalent structures have high melting and boiling points?
Breaking the numerous covalent bonds requires a lot of energy.
Do most covalent substances conduct electricity?
No, because there are no charged particles free to move.
Fill in the blank: Water (H2O) is formed when oxygen shares a pair of electrons with each _______ atom.
hydrogen
What type of bonds does methane (CH4) contain?
Four covalent bonds.
How does each carbon atom in diamond bond with other carbon atoms?
By forming four covalent bonds.
What is the result of the covalent bonding in diamond?
A giant covalent structure.
