Potassium is an alkali metal in group IA of the periodic table with atomic number 19, an atomic weight of 39.102, and a density of 0.86 Mg/m 3. Its melting point is 63.7 C, and it boils at 760 C. The ...

10 Subtle Asian Traits memes you'll relate to if you're Asian or TCK 4. 19 is the atomic number for the element potassium. 5. In Islam, there are believed to be 19 angels guarding Hell.

The atom with eight protons in its nucleus (atomic number 8) is oxygen. Each energy level holds a ... the next electron goes into the fourth level. 4th Period: Potassium and Calcium—Electrons go into ...