User:Kelvinchanchanchan/Books/Period 4 elements

By Wikipedia

 * Overview
 * Period 4 element


 * Elements
 * Potassium
 * Calcium
 * Scandium
 * Titanium
 * Vanadium
 * Chromium
 * Manganese
 * Iron
 * Cobalt
 * Nickel
 * Copper
 * Zinc
 * Gallium
 * Germanium
 * Arsenic
 * Selenium
 * Bromine
 * Krypton