As of 2014, there are 84 metal elements on the Periodic Table of Elements, four of which are unnamed at this time. Metals are one of three classifications of the elements: there are metals, nonmetals and metalloids. Name... More »

Helium is a nonmetal element. It is the second element on the periodic table, following hydrogen, and is part of the highly stable noble gas group. Noble gas elements are known for their low reactivity due to their full ... More »

Lead is a metal element that is solid at room temperature. It has a boiling point of 3,180 degrees Fahrenheit, a melting point of 621.34 degrees F and a density of 11.342 grams per cubic centimeter. The element has an at... More »

When Dmitri Mendeleev created the Periodic Table of the Elements, he decided against arranging them by their atomic numbers based on his correct assumption that those numbers were not totally accurate. When he first bega... More »

In a color-coded periodic table of the elements, the box for each element is colored. This color represents the classes of elements, which include metals, metalloids and non-metals. In general, the color blue is used for... More »

The periodic table was built to show the relationships among the various elements. The periodic table was constructed in 1869 by Dmitri Mendeleev. More »

Some elements on the periodic table are oxygen, helium, arsenic and fluorine. Oxygen is an odorless, tasteless and colorless gas at room temperature, but is bright blue as a liquid. Oxygen is a very reactive element and ... More » Science Chemistry