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The greater the density of an element is, the "heavier" the element is.

Color- The color of an element refers to its physical reflection of light under normal conditions.

Atomic masses used on this periodic table are from the IUPAC 1995 recommendations.

For example, an element with a cubic crystal structure, such as aluminum (Al), will break into cubes. Density- The density of an element refers to how closely its atoms are packed together. This means that if you have a block of magnesium at room temperature (293 Kelvin), and you decide to cut a cube measuring 1 x 1 x 1 cm, the mass that you will cut will be 1.738 grams.This is because both the protons and the neutrons in an atom have a relatively equal mass.The mass of an electron is so insignificant that it is not represented in the atomic mass.Other Names- Some elements have more than one name or spelling.This may be caused by either local spelling or a naming dispute.