Magnesium

Magnesium is a chemical element with the symbol Mg and atomic number 12. It is a shiny gray solid and is an essential mineral for human health. Magnesium is involved in more than 300 biochemical reactions in the body, including energy production, muscle function, and regulation of the nervous system.

Properties of Magnesium

Atomic number: 12
Symbol: Mg
Atomic mass: 24.305 u
Melting point: 1,202°F (650°C)
Boiling point: 1,994°F (1,090°C)
Density: 1.738 g/cm³

Uses of Magnesium

Magnesium has many practical applications, including:

Alloying agent in aluminum-magnesium alloys for lightweight construction
Flare production due to its bright, white light when ignited
Medicinal use as a dietary supplement and in antacids
Pyrotechnics and fireworks due to its flammability

Study Guide

Here are some key points to remember when studying magnesium:

Atomic Number and Symbol: Magnesium's atomic number is 12 and its symbol is Mg.
Physical Properties: Know the melting point, boiling point, and density of magnesium.
Chemical Reactions: Understand magnesium's role in biochemical reactions in the body.
Uses: Be familiar with the various practical applications of magnesium.

Remember to review the periodic table to understand magnesium's position and its relationship to other elements.

Good luck with your studies!