The elements that make up each column of the periodic table share a set of common traits. Here, a chemist describes group 15 and the crucial role they play in life.

If you are intimidated by the periodic table, then this introduction through the first column of elements will give you a feel for how and why the elements are arranged in this order.

Magnesium is metal in group IIA of the periodic table with the atomic number 12, an atomic weight of 24.312, a density of 1.74 Mg/m 3, and a melting temperature of 650 C.. The electronic configuration ...

Strontium is a metal in group IIA of the periodic table with atomic number 38, an atomic weight of 87.62, and a density of 2.6 Mg/m 3. Its melting point is 768 C, and it boils at 1380 C. The ...