Advertisement.

EnchantedLearning.com is a user-supported site.
As a bonus, site members have access to a banner-ad-free version of the site, with print-friendly pages.
Click here to learn more.

ad
(Already a member? Click here.)


Our subscribers' grade-level estimate for this page: 6th - 7th

Periodic Table of the Elements
Atomic Number

The periodic table of the elements shows the types of elements that make up the universe and the relative properties of the atoms. In it, the elements are arranged by increasing atomic number (the number of protons in the nucleus of an atom).

Each of the elements in a group (a column) have qualities in common. For example, group 18 (or 8a) is the inert gases, which do barely interact chemically with other elements because they have no valence electrons. Each of the elements in a period (a row) have the same number of electron shells; the number of electrons in these shells (the element's atomic number) increases from left to right.

The periodic table was invented by Dmitri I. Mendeleev and was later revised by Henry G. J. Moseley.

PeriodGroup
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
1A 2A 3B 4B 5B 6B 7B 8B 1B 2B 3A 4A 5A 6A 7A 8A
1 H
1
He
2
2 Li
3
Be
4
B
5
C
6
N
7
O
8
F
9
Ne
10
3 Na
11
Mg
12
Al
13
Si
14
P
15
S
16
Cl
17
Ar
18
4 K
19
Ca
20
Sc
21
Ti
22
V
23
Cr
24
Mn
25
Fe
26
Co
27
Ni
28
Cu
29
Zn
30
Ga
31
Ge
32
As
33
Se
34
Br
35
Kr
36
5 Rb
37
Sr
38
Y
39
Zr
40
Nb
41
Mo
42
Tc
43
Ru
44
Rh
45
Pd
46
Ag
47
Cd
48
In
49
Sn
50
Sb
51
Te
52
I
53
Xe
54
6 Cs
55
Ba
56
... Hf
72
Ta
73
W
74
Re
75
Os
76
Ir
77
Pt
78
Au
79
Hg
80
Tl
81
Pb
82
Bi
83
Po
84
At
85
Rn
86
7 Fr
87
Ra
88
... Rf
104
Db
105
Sg
106
Bh
107
Hs
108
Mt
109
Uun
110
Uuu
111
Uub
112
Lanthanides La
57
Ce
58
Pr
59
Nd
60
Pm
61
Sm
62
Eu
63
Gd
64
Tb
65
Dy
66
Ho
67
Er
68
Tm
69
Yb
70
Lu
71
Actinides Ac
89
Th
90
Pa
91
U
92
Np
93
Pu
94
Am
95
Cm
96
Bk
97
Cf
98
Es
99
Fm
100
Md
101
No
102
Lr
103


Color Key:
Series Name Property
group 1 or 1a Alkali metals One valence electron
2 or 2a Alkaline-earth metals Two valence electrons
3 or 3b Transition elements
Poor metals
Nonmetals
Metalloids
17 or 7a Halogens Seven valence electrons
18 or 8A Noble (inert) gases No valence electrons
Lanthanide series Rare earths
Actinide series Radioactive rare earths


Enchanted Learning®
Over 35,000 Web Pages
Sample Pages for Prospective Subscribers, or click below

Overview of Site
What's New
Enchanted Learning Home
Monthly Activity Calendar
Books to Print
Site Index

K-3
Crafts
K-3 Themes
Little Explorers
Picture dictionary
PreK/K Activities
Rebus Rhymes
Stories
Writing
Cloze Activities
Essay Topics
Newspaper
Writing Activities
Parts of Speech

Fiction
The Test of Time

Biology
Animal Printouts
Biology Label Printouts
Biomes
Birds
Butterflies
Dinosaurs
Food Chain
Human Anatomy
Mammals
Plants
Rainforests
Sharks
Whales
Physical Sciences: K-12
Astronomy
The Earth
Geology
Hurricanes
Landforms
Oceans
Tsunami
Volcano
Languages
Dutch
French
German
Italian
Japanese (Romaji)
Portuguese
Spanish
Swedish
Geography/History
Explorers
Flags
Geography
Inventors
US History

Other Topics
Art and Artists
Calendars
College Finder
Crafts
Graphic Organizers
Label Me! Printouts
Math
Music
Word Wheels

Click to read our Privacy Policy

E-mail


Enchanted Learning Search

Search the Enchanted Learning website for:



Advertisement.

Advertisement.


Copyright ©2001-2018 EnchantedLearning.com ------ How to cite a web page