Chlorine

=Chlorine=

symbol- CL atomic number- 17 atomic mass- 35 melting point- 101.5 degress celes boiling point-34.4 degress celes normal phase- non-metal
 * 1) of protons 17
 * 2) of nuetrons- 18
 * 3) of electrons- 17

The name comes from the Greek. It was founded in 1774 by Carl Wilhelm Scheele. The most common uses is for pools.