1. ionic bonding involves the of electrons, whereas covalent bonding involves the of electrons.
a. transfer, sharing
b. removal, gain
c. sharing, loss
d. transfer, gaining

2.
which scientist found that gas expands to fill the space of a container and is made of particles that can move?
a. bohr
b. boyle
c. dalton
d. democritus

3. when acids contact metal, they are
a. protective
b. corrosive
c. non-reactive

4. different types of matter melt at different temperatures.
true
false