Elements and Their Properties
B
"hard, black, shiny material then suddenly changes to brown powder" = metalloid; 2 energy levels; conducts electricity and heat poorly; used in control rods for nuclear reactors
Al
Most abundant metal in the Earth's crust; 3 valence electrons, 13 protons
S
bright yellow crystals
Cl
burns your nostrils and throat; diatomic halogen
He
clear gas; turns voice high pitched a squeaky; atoms of this element are also molecules
P
glow in the dark; occurs in teeth and bones as calcium phosphate
F
green-yellow gas; high electron affinity; help reduce tooth decay
Ne
inert (noble) gas; emits bright orange-red light
O
life-giving gas; 20% of normal air; diatomic gas
Be
light gray metal; used to reinforce other metals; melting point of 1300 (high melting point = solid metal)
Si
metalloid; semiconductor; makes sand- but not diamonds
H
most abundant element in the universe; simplest and lightest of all metals; transparent gas
N
no color, taste, odor; 80% of normal air; can be used to make laughing gas
Li
silver-gray metallic solid; very soft; burns your skin; reaction with water: momentarily floats, before causing a small explosion
Na
soft, white metal; low electron affinity; will replace hydrogen atoms when placed in water
C
solid; basic unit for all living things
Ar
thick, inert (noble) gas; 8 electrons in 3rd energy level
Mg
white solid; used in aerospace industries in alloys with other metals; burns brilliantly in the air; + ions
