Lithium is an alkali metal in group IA of the periodic table with atomic number 3, an atomic weight of 6.939, and a density of 0.53 Mg/m 3. Its melting point is 180.5 C, and it boils at 1330 C. The ...

After the first level has two electrons, the next electron goes into the second level. 2nd Period: Lithium to neon—Electrons go into the second level. After the second level has 8 electrons, the next ...

They include lithium, sodium and potassium, and are placed in the first vertical column on the left of the periodic table. All the Group 1 elements are very reactive, and all react with water to ...

For example, lithium (Li), sodium (Na ... the first practical periodic tables in the 19th century. The modern periodic table is based closely on the ideas he used. These ideas were: The elements ...