Mendeleev

Group one elements share common characteristics. They are all soft, silver metals. Due to their low ionization energy, these metals have low melting points and are highly reactive. The reactivity of this family increases as you move down the table.

Francium

lithium

The Group 3A metals have three valence electrons in their highest-energy orbitals (ns2p1). They have higher ionization energies than the Group 1A and 2A elements, and are ionized to form a 3+ charges. The Group 3A metals are silvery in appearance, and like all metals are good conductors of electricity.

List

Three Elements

• We all know oxygen, silicon, and aluminum are common elements in the Earth’s crust.
• The combined occurrences for these three elements are very well known.
• For all three together, we find the mineral kyanite.

There are three basic elements to fitness: aerobic activity, strength training and flexibility.

In the beginning, or at least following the Big Bang more than 14 billion years ago, there was hydrogen, some helium and a little bit of lithium. A grand total of three elements.

The four basic elements of life are: Oxygen, hydrogen, nitrogen and phosphorus. These four elements are found in abundance in both the human body and in animals. There are other elements that compose the human body, but the four we’ve highlighted participate in all life processes.