Mendelev Papers

  H (1) nonmetal
· colorless, odorless gas
· highly reactive
· lighter than air
He (4) nonmetal
· colorless, odorless gas
· unreactive
· lighter than air
Li (7) metal
· soft, silver-gray
· very reactive with H2O
· not common in nature
Be (9) metal
· moderately soft, lead gray
· somewhat rare
O (16) nonmetal
· colorless, odorless gas
· extremely reactive
· abundant in nature
C (12) nonmetal
· black or colorless crystals
· abundant in nature
N (14) nonmetal
· colorless, odorless gas
· abundant in nature
B (11) metalloid
· black crystalline solid
· somewhat rare
P (31) nonmetal
· colorless, red, or silver-white solid
· abundant in living organisms
Ne (20) nonmetal
· colorless, odorless gas
· unreactive
Na (23) metal
· very soft, silver-white
· very reactive with H2O
Mg (24) metal
· grayish-white
· compounds abundant on Earth
Al (27) metal
· soft, silver
· compounds abundant on Earth
Si (28) metalloid
· dark gray-blue
· very abundant on Earth
F (19) nonmetal
· pale yellow gas
· extremely reactive
· highly toxic
S (32) nonmetal
· yellow crystals
· reactive
· can form poisonous compounds
Cl (35) nonmetal
· grayish-yellow gas
· very reactive
· strong odor & extremely toxic
Ca (40) metal
· hard, silver-white
· highly reactive
· abundant on Earth
K (40) metal
· silver white
· very reactive with H2O
· very abundant in nature
Ar (40) nonmetal
· colorless, odorless gas
· unreactive
· heavier than air
Ga (70) metal
· soft, silver-white
· melts in your hand
Ge (73) metalloid
· grayish white solid
· forms brittle crystals
As (75) metalloid
· metallic gray or yellow solid
· extremely poisonous
Se (79) nonmetal
· gray and metallic or deep red solid
· forms toxic compounds
Br (80) nonmetal
· heavy, red-brown liquid
· serious health hazard
· strong, unpleasant odor
Kr (84) nonmetal
· colorless, odorless gas
· not reactive
· heavier than air