Element
Symbol
Atomic Number
Symbol
Element
100

O

Oxygen

100

Chlorine

Cl

100

6

Carbon

100

Neon

Ne

100

Br

Bromine

200

Fe

Iron

200

Manganese

Mn

200

15

Phosphorus 

200

Potassium 

K

200

Cu

Copper 

300

Zn

Zinc

300

Arsenic

As

300

27

Cobalt

300

Gallium

Ga

300

Kr

Krypton 

400

Y

Yttrium

400

Silver

Ag

400

34

Selenium

400

Palladium

Pd

400

Ru

Ruthenium 

500

Sn

Tin

500

Rubidium

Rb

500

42

Molybdenum

500

Zirconium

Zr

500

Cd

Cadmium 

M
e
n
u