General Info

Periodic Table

Periodic Table

Elements are listed in order of increasing atomic number, lined up so that elements which exhibit similar properties are arranged in the same row or column as each other. There are 90 elements on the periodic table that occur in nature. All of the other elements are strictly man-made. Technetium was the first element to read more

Electromagnetic Spectrum

Electromagnetic Spectrum

Electromagnetic radiation can be described in terms of a stream of photons, which are massless particles each traveling in a wave-like pattern and moving at the speed of light. Each photon contains a certain amount (or bundle) of energy, and all electromagnetic radiation consists of these photons. The only difference between the various types of read more