Lead
Nitrogen
Potassium
Sodium
Thallium
Pb
N
K
Na
Tl
-metal
-soft, silver
-lustrous
-very dense
-allotropic
-nonmetal
-gas
-colorless
-stable
-metal
-soft, silver
-low density
-bursts into flame
in water
-metal
-soft, silver
-low density
-reacts vigorously
with water
-metal
-soft, gray-white
-very dense
-lustrous
207
Lithium
14
Oxygen
39
Rubidium
23
Strontium
204
Tin
Li
O
Rb
Sr
Sn
-metal
-soft, silver
-very low density
-reactive in water
-Nonmetal
-gas
-abundant
-allotropic
-metal
-soft, silver
-low density
-reacts violently
with water
-metal
-hard, silver-gold
-allotropic
7
Magnesium
16
Phosphorous
85
Selenium
-metal
-soft, silver-white,
lustrous
-low density
-reacts vigorously
with water to form
a base
88
Sulphur
Mg
P
Se
S
Xe
-metal
-soft, silver-white,
lustrous
-low density
-reacts vigorously
with hot water to
form a base
-nonmetal
-soft, white
-allotropic
-poisonous
compounds
-very reactive
-semimetal
-solid
-allotropic
-forms
compounds with
unpleasant odors
-nonmetal
-solid
-allotropic
-forms
compounds with
obnoxious odors
-nonmetal
-gas
-very stable
24
Neon
31
Polonium
79
Silicon
32
Tellurium
131
Radon
Ne
Po
Si
Te
Rn
-nonmetal
-gas
-very stable
-metalloid
-rare
-radioactive
-metalloid
-allotropic
-stable
-metalloid
-solid
-allotropic
-forms
compounds with
obnoxious odors
-nonmetal
-gas
-stable
-rare
-radioactive
20
209
28
128
222
119
Xenon
Aluminum
Astatine
Boron
Carbon
Germanium
Al
At
B
C
Ge
-metal
-soft, silver
-abundant
-doesn’t occur in
pure form
-conductor
-metalloid
-man-made
element
-solid (?)
-radioactive
-metalloid
-rare
-doesn’t occur
naturally in pure
form
-insulator
-nonmetal
-abundant
-allotropic
-metalloid
-rare
-allotropic
27
Antimony
210
Beryllium
11
Bromine
12
Chlorine
73
Indium
Sb
Be
Br
Cl
In
-metalloid
-brittle, gray,
lustrous
-poor conductor
-doesn’t react
with dilute acid
-poisonous
compounds
122
Argon
-metal
-dark
-lustrous
-rare
-poor conductor
-nonmetal
-brown liquid
-poisonous
-reacts vigorously
with metals to
form salts
-nonmetal
-green gas
-poisonous
reacts violently
with metals to
form a salt
-metal
-soft, gray-silver
-shiny
-very rare
9
Barium
80
Calcium
35
Fluorine
115
Iodine
Ar
Ba
Ca
F
I
-nonmetal
-gas
-very stable
-metal
-soft, silver-white
-shiny
-low density
-reacts vigorously
with cold water to
form a base
-metal
-silver-white
-low density
-shiny
-reacts vigorously
with water to form
a base
-nonmetal
-green gas
-poisonous
-reacts violently
with metals to
form a salt
-nonmetal
-solid
-violet
-reacts easily with
metals to form
salts
39
Arsenic
137
Bismuth
40
Cesium
19
Mystery Element
127
Krypton
As
Bi
Cs
Kr
-metalloid
-gray
-lustrous
-allotropic
-reactive
-poisonous
compounds
-metal
-lustrous
-brittle
-allotropic
-conductor
-metal
-soft, silver
-shiny
-low density
-conductor
-reacts violently in
water
-nonmetal
-gas
-very stable
75
209
133
84