8. Which of the following group of three metals is arranged in order of increasing chemical property?
a. Potassium, iron, lead
b. gold, tin, sodium
C. zinc, calcium, silver
d. lithium, silver, gold
9. It is the ability of metal to carry electric current.
a. thermal conductivity b. ductility
c. malleability
d. electrical conductivity
10. What best explains why metals are good electrical conductors?
a. Their atoms are loosely packed and able to move freely.
b. Metal atoms form a long time that allows little movement.
c. Metal ions form a lattice surrounded by a "sea of free electrons".
d. Their atoms are held together by strong electrostatic attraction between anions
and cations.​