Covalent Bonding Flashcards
1
Q
What do covalent bonds form between
A
non-metal atoms
2
Q
How does a covalent bond form
A
when two positive nuclei are held together by their common attraction for a shared pair of electrons
3
Q
7 elements exist as diatomic molecules through the formation of covalent bonds, what are they
A
Bromine Oxygen Fluorine Iodine Nitrogen Chlorine Hydrogen
4
Q
Properties of covalent molecular substance
A
- have strong covalent bonds within the molecules and only weak attractions between the molecules
- have low melting and boiling points as only weak forces of attraction between the molecules are broken when a substance changes state
- do not conduct electricity because they do not have charged particles which are free to move
- insoluble in water but may dissolve in other solvents
5
Q
Do covalent substances conduct
A
Covalent substances do not conduct electricity in any state with the exception of carbon
6
Q
Properties of covalent network structure
A
- have a network of strong covalent bonds within one giant structure
- have very high melting and boiling points because the network of strong covalent bonds is not easily broken
- in general do not conduct electricity. This is because they do not have charged particles which are free to move
- do not dissolve
7
Q
What does the formula of a covalent network tell us
A
the simplest ratio of each type of atom in the substance
