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 ...

After the third energy level has 8 electrons, the next electron goes into the fourth level. 4th Period: Potassium and Calcium—Electrons go into the fourth energy level. A small piece of sodium metal ...

The modern periodic table is based closely on the ideas he ... For example, lithium (Li), sodium (Na) and potassium (K) all have the same kind of reaction with water. The group of elements below ...

These are almost one-quarter of the periodic table and are mainly found in the ... sulphur, chlorine, potassium, sodium, calcium and magnesium. How polio affects the body and what WHO is doing ...

The modern periodic table is based closely on the ideas he ... For example, lithium (Li), sodium (Na) and potassium (K) all have the same kind of reaction with water. The group of elements below ...