Show:
element symbols
Atomic Numbers

Periodic Table
100
Ti
Titanium
100
Hydrogen 
1
100
How many rows are there on the Periodic Table
18
200
S
Sulfur
200
Cobalt
27
200
How many elements are there in the Periodic Table
118
300
Li
Lithium
300
Radium
88
300
How many groups are there 
18
400
Db
Dubnium
400
Osmium
76
400
What are the two rows on the bottom of the periodic Table

lanthanide and actnide series

500
Hf
Hafnium
500
Copper
29
500
What splits the metals from the non metals 
The stair step