Helium

(a)  

Lithium

(a)  

1. Beryllium

1. Boron

Carbon

(a)  

1. Nitrogen

Oxygen

(a)  

1. Fluorine 

1. Neon

1. Sodium

1. Magnesium

1. Aluminum

1. Silicon

1. Phosphorus

1. Sulfur

Chlorine

(a)  

1. Argon

1. Potassium

1. Calcium

1. Scandium

1. Titanium

1. Vanadium

Chromium

(a)  

Manganese

(a)  

1. Iron

Cobalt

(a)  

Nickle

(a)  

Copper

(a)  

Zinc

(a)  

Gallium

(a)  

1. Germanium

1. Arsenic 

1. Selenium

1. Bromine

1. Krypton

1. Rubidium

1. Strontium

Yttrium

(a)  

Zirconium

(a)  

Niobium

(a)  

Molybdenum

(a)  

Technician

(a)  

1. Ruthenium

Rhodium

(a)  

Palladium

(a)  

Silver

(a)  

Cadmium

(a)  

Indium

(a)  

Tin

(a)  

Antimony

(a)  

Tellurium

(a)  

Iodine

(a)  

Xenon

(a)  

Caesium

(a)  

1. Barium

H

(a)  

He

(a)  

Li

(a)  

Be

(a)  

B

(a)  

C

(a)  

N

(a)  

O

(a)  

Fl

(a)  

Ne

(a)  

Na

(a)  

Mg

(a)  

Al

(a)  

Si

(a)  

P

(a)  

S

(a)  

Cl

(a)  

Ar

(a)  

K

(a)  

Ca

(a)  

Sc

(a)  

Ti

(a)  

V

(a)  

1. Cr

Mn

(a)  

Fe

(a)  

Co

(a)  

Ni

(a)  

Cu

(a)  

Zn

(a)  

Ga

(a)  

Ge

(a)  

As

(a)  

Se

(a)  

Br

(a)  

Kr

(a)  

Rb

(a)  

Sr

(a)  

Y

(a)  

Zr

(a)  

Nb

(a)  

Mo

(a)  

Tc

(a)  

Ru

(a)  

Rh

(a)  

Pd

(a)  

Ag

(a)  

Cd

(a)  

In

(a)  

Sn

(a)  

Sb

(a)  

Te

(a)  

I

(a)  

Xe

(a)  

Cs

(a)  

Ba

(a)