Atomic Structure, Periodic Table, Chemical Bonds, Chemical Formulas Worksheet Page 21
ADVERTISEMENT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
2516B
Chemical Formulas
Investigation
16B Chemical Formulas
Why do atoms combine in certain ratios?
Materials
Chemists have long noticed that groups of elements behave similarly. The
periodic table is an arrangement of the elements grouped according to
• Periodic Table Tiles
similar behavior. In this investigation, you will discover how the
• Periodic table with
arrangement of electrons in atoms is related to groups on the periodic
oxidation numbers
table. You will also learn why atoms form chemical bonds with other atoms
• Special Bonds cards
in certain ratios.
A
Oxidation numbers and ions
An element’s oxidation number indicates how many electrons are lost or gained when chemical
bonding occurs. The oxidation number is equal to the charge an atom has when it ionizes, that
is, gains or loses electrons to become an ion. The partial periodic table below shows the most
common oxidation numbers of the elements. The oxidation numbers are written above the
group number above each column on the table. The most common oxidation numbers for the
main group elements are shown.
1
ADVERTISEMENT
0 votes
Related Articles
Related forms
Related Categories
Parent category: Education