Covalent bonding Flashcards
what is a covalent bond?
a bond that occurs between two non-metal elements
give 2 examples of simple covalent bonds
O2
H2O
NH3
what state do simple covalent compounds exist in?
gases or liquids
why do simple covalent compounds have low melting and boiling points?
weak (intermolecular) forces between molecules
do simple covalent compounds conduct electricity?
no
what are polymers?
a long chain molecule made from many smaller molecules
what is a monomers?
a small molecule that joins with other molecules
1 example of a polymer
plastic
nylon
what state are polymers at room temperature?
solid
why are polymers solid at room temperature?
they have strong intermolecular forces
what are cross links?
covalent bonds between polymer chains
what are the three states of matter?
solid
liquid
gas
stronger forces between molecules = ?
++ why?
higher melting/boiling points
++ more energy is needed to break the bonds
