symbols
FE
Iron
Colbalt
CO
Xenon
54
Au
Gold
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
CA
Calcium
Hydrogen
H
Helium
2
AG
Silver
how many elements are currently on the periodic table.
118
C
Carbon
Uranium
U
Radium
88
FE
Iron
The six naturally occurring elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and the radioactive radon (Rn).
noble gases
HG
Helium
Iodine
I
Clorine
17
How many metals in periodic table
@ 91
Nonmetals
NE
Neon
Argon
Ar
94
AL
Aluminum
This Radioactive Heavy Metal is considered the most dangerous element on earth
Plutonium