Atoms+ICS16OST

atom- Smallest particle that can still be considered an element proton- Small, positive charged neutron- Small, no charge electron- a tiny negative charged particle that orbits the nucleus. nucleus- The center core of an atom which contains protons and neutrons. atomic number- Number of protons and element have atomic weight- The sum of protons and neutrons. atomic symbol- A subscript way an atom is found

=** Chlorine **= Symbol: Cl Atomic Number: 17 Atomic Weight: 35.4527 Element Classification: Halogen Discovered By: Carl Wilhelm Scheele Discovery Date: 1774 (Sweden) Name Origin: Greek: chloros (greenish yellow).

Compounds it can make: Sodium Chloride Sodium+ Chlorine Aluminum Trichloride 1 Aluminum and 3 Chlorine Nitrogen Trichloride 1 Nitrogen and 3 Chlorine Electronic Configuration

There are 17 protons and 17 electrons in the Chlorine atom.