The Periodic Table of Elements
1
18
DMITRI MENDELEYEV (1834 - 1907)
1
HYDROGEN
H
1
The Russian chemist, Dmitri Menedeleyev, was the first to observe that if elements were listed in
order of atomic mass, they showed regular(periodical) repeating properties. He formulated his
: Liquid at room temperature
discovery in a periodic table of elements, now regarded as the backbone of modern chemistry.
The crowning achievement of Mendeleyev’s periodic table lay in his prophecy of then,
: Radioactive
: Artificially made
undiscovered elements. In 1869, the year published his periodic classification, the elements
gallium, germanium, and scandium were unknown. Mendeleyev left spaces for them in his table
13
14
15
16
and even predicted their atomic masses and other chemical properties. Six years later, gallium
7
8
was discovered and his predictions wee found to be accurate. Other discoveries followed and
6
5
NITROGEN
OXYGEN
their chemical behavior matched that predicted by Mendeleyev.
CARBON
BORON
N
O
This remarkable man, the youngest in a family of 17 children, has left the scientific community
C
B
with a classification system so powerful that it became the cornerstone in chemistry teaching
10.81
12.01
14.01
16.00
and the prediction of new elements ever since. In 1955, element 101 was named after him: Md,
Mendelevium.
1.01
2
2
3
3
LITHIUM
Li
6.94
11
SODIUM
Na
22.99
4
BERYLLIUM
Be
9.01
4
5
39.1
24.31
20
CALCIUM
Ca
40.08
37
38
RUBIDIUM STRONTIUM
Rb
Sr
85.47
87.62
55
CAESIUM
Cs
6
7
132.91
56
BARIUM
Ba
137.33
87
FRANCIUM
Fr
(223)
1
Atomic number = # of protons = # of electron
HYDROGEN Element Name
Atomic Mass =
H
Element Symbol
# of protons + # of neutrons =
1.01
average mass of the isotopes
Use of element
12
MAGNESIUM
Mg
19
POTASSIUM
K
88
RADIUM
Ra
(226)
: Gas at room temperature
: Solid at room temperature
3
4
5
21
SCANDIUM
Sc
22
TITANIUM
Ti
23
VANADIUM
V
44.96
39
YTTRIUM
Y
88.91
50.94
47.88
40
ZIRCONIUM
Zr
91.22
92.91
72
Lanthanide HAFNIUM
Series
Hf
57-71
La -Lu
Actinide
Series
89-103
Ac-Lr
41
NIOBIUM
Nb
178.49
104
RUTHERFORDIUM
Rf
(261)
73
TANTALUM
Ta
180.95
105
DUBNIUM
Db
(262)
6
7
24
25
CHROMIUM MANGANESE
Cr
Mn
52.00
54.94
13
ALUMINUM
Al
26.98
8
9
10
11
12
26
IRON
Fe
27
COBALT
Co
28
NICKEL
Ni
29
COPPER
Cu
30
ZINC
Zn
55.85
58.93
58.69
63.55
42
43
44
45
MOLYBDENUM TECHNETIUM RUTHENIUM RHODIUM
Mo
Tc
Ru
Rh
46
PALLADIUM
Pd
95.94
106.42
(98)
74
TUNGSTEN
W
183.85
75
RHENIUM
Re
186.21
106
107
SEABORGIUM BOHRIUM
Sg
Bh
(263)
(264)
101.07
76
OSMIUM
Os
190.23
102.91
77
IRIDIUM
Ir
192.22
47
SILVER
Ag
107.87
78
PLATINUM
Pt
195.08
79
GOLD
Au
196.97
65.39
48
CADMIUM
Cd
112.41
80
MERCURY
Hg
200.59
31
GALLIUM
Ga
69.72
28.09
32
GERMANIUM
Ge
49
INDIUM
In
114.82
81
THALLIUM
Tl
204.38
50
TIN
Sn
118.71
82
LEAD
Pb
207.20
17
9
FLUORINE
F
19.00
4.00
10
NEON
Ne
20.18
17
18
15
16
ARGON
PHOSPHORU SULPHUR CHLORINE
Cl
Ar
S
S
30.97 P
32.06
35.45
39.95
14
SILICON
Si
72.61
2
HELIUM
He
33
ARSENIC
As
30.97
34
SELENIUM
Se
78.96
51
52
ANTIMONY TELLURIUM
Sb
Te
121.76
83
BISMUTH
Bi
208.98
127.60
84
POLONIUM
Po
(209)
35
BROMINE
Br
79.90
53
IODINE
I
126.90
85
ASTATINE
At
(210)
36
KRYPTON
Kr
83.80
54
XENON
Xe
131.29
86
RADON
Rn
(222)
118
108
109
110
111
112
113
114
115
117
116
HASSIUM MEITNERIUM DARMSTADTIUM ROENTGENIUM COPERNICIUM UNUNTRIUM FLEROVIUM UNUNPENTIUM LIVERMORIUM UNUNPSEPTIUM UNUNOCTIUM
Uuo
Hs
Mt
Ds
Rg
Uut
Fl
Uup
Uus
Lv
Cn
(265)
(266)
(281)
(281)
(285)
(286)
(289)
(289)
(291)
(294)
(294)
: Alkai Metals
: Alkaline Earth Metals
: Metals
: Metalloids
57
LANTHANUM
La
138.91
58
CERIUM
Ce
140.12
59
60
61
62
PRASEODYMIUM NEODYMIUM PROMETHIUM SAMARIUM
Pr
Nd
Pm
Sm
140.91
144.24
(145)
150.36
63
64
EUROPIUM GADOLINIUM
Eu
Gd
151.96
157.25
65
TERBIUM
Tb
158.93
66
67
DYSPROSIUM HOLMIUM
Dy
Ho
162.50
164.93
68
ERBIUM
Er
167.26
69
THULIUM
Tm
168.93
70
YTTERBIUM
Yb
173.04
71
LUTETIUM
Lu
174.97
: Non-Metals
: Halogens
: Noble Gases
: Lanthanides
89
ACTINIUM
Ac
(227)
90
91
92
THORIUM PROTACTINIUM URANIUM
Th
Pa
U
232.04
231.04
238.03
93
94
95
NEPTUNIUM PLUTONIUM AMERICIUM
Np
Pu
Am
(237)
(244)
(243)
96
CURIUM
Cm
(247)
97
98
99
BERKELIUM CALIFORNIUM EINSTEINIUM
Bk
Cf
Es
(247)
(251)
(252)
100
FERMIUM
Fm
(257)
101
102
103
MENDELEVIUM NOBELIUM LAWRENCIUM
Md
No
Lr
(258)
(259)
(262)
: Actinides
Adapted from the following websites: http://www.sciencegeek.net/tables/DeltaBio.pdf , http://education.jlab.org/itselemental/tableofelements.pdf