Bonding Flashcards
how do metals become ions
lose electrons and become positive
how do non metals become ions
gain electrons and become negative
how is ionic binding shown
dot cross diagrams
how do you calculate relative atomic mass
(1st isotope x abundance ) + (2nd isotope x abundance) / 100
what is meant by a covalent bonds
shared pair of electrons between non metal atoms
what are the two types of covalent structures
simple and giant
do ionic compounds have a high or low melting point
high
why do ionic compounds have high melting points
1) giant lattice structure
2) strong electrostatic attractions between positive and negative ions
3) high amount of energy needed to break bonds
do simple covalents have a high or low melting points
low
why do simple covalents have a low melting point
1) weak intermolecular forced
2) low amount of energy needed to break these forces
do giant covalents have a high or low melting point (diamond and graphite )
high
why does diamond and graphite have a high melting point
1) giant covalent
2) 4(diamond)/3 (graphite) covalent bonds on each atom
3) lots of energy needed to break the bonds
can ionic compounds conduct electricity
not in solids but yes in liquids
why can ionic compounds conduct in liquids but not solids
1) solid ions are fixed and unable to move and carry a charge
2) liquid ions are unfixed and can move and carry a charge
can simple covalents conduct electricity
no because there are no spare electrons to carry a charge
