Barium is a metal in group IIA of the periodic table with atomic number 56, an atomic weight of 137.34, and a density of 3.5 Mg/m 3. Its melting point is 714 C, and it boils at 1640 C. The electronic ...

A more complicated example can be seen when solid barium hydroxide is added to solid ammonium chloride. The temperature of the chemicals in the container drops dramatically, a liquid appears and a ...