symbols
elements
Atomic Number
metals
misc
100

FE

Iron

100

 colbalt

CO

100

Xenon

54

100

Au

Gold

100

Who development of the periodic table, arranging chemical elements by atomic mass. He predicted the discovery of other elements, and left spaces open in his periodic table for them.

Dmitri Mendeleev

200

CA

Calcium

200

Hydrogen

H

200

Helium

2

200

AG

Silver

200

how many  elements are currently on the periodic table.

118

300

 Rn

 Radon

300

Uranium

U

300

Radium

88

300

FE

Iron

300

ways of listing elements

Periodic Table

400

 Zn

 Zinc

400

Iodine

I

400

Clorine

17

400

How many metals in periodic table

@ 91

400

Elements are listed by their _________ number

 Atomic

500

Ti

 titanium 

500

Argon

Ar

500
plutonium

94

500

AL

Aluminum

500

 This Radioactive Heavy Metal is considered the most dangerous element on earth

Plutonium