Approximately the number of protons and neutrons in the atom
Atomic Number - 18
Atomic Mass- 39.948
Symbol - Ar
Top right of periodic table, not metal, ex: hydrogen, helium, nitrogen, oxygen, fluorine, neon, chlorine, argon, krypton, xenon and radon
an ion with a negative charge
Group IA of the Periodic Table
IIIB, IVB, VB, VIB, VIIB, VIII, IB, IIB, (groups)
Atomic Number - 50
Atomic Mass- 118.71
Symbol - Sn
solid at room temperature, most of the periodic table, ex: aluminium, copper, iron, tin, gold, lead, silver, titanium, uranium, and zinc
any atoms having the same number of protons but a different number of neutrons
Atomic Number - 82
Atomic Mass- 207.2
Symbol - Pb
Atomic Number - 6
Atomic Mass- 12.0107
Symbol - C
Share properties from both metals and nonmetals, ex: boron, germanium, arsenic, silicon, tellurium, polonium and antimony
(Vertical column), elements have the same outer electron arrangment
Atomic Number - 26
Atomic Mass- 55.845
Symbol - Fe
Atomic Number - 16
Atomic Mass- 32.065
Symbol - S
Atomic Number - 53
Atomic Mass- 126.9045
Symbol - I