Approximately three-quarters of all recognized chemical components are metals. The most plentiful varieties within the Earth’s crust are aluminum, iron, calcium, sodium, potassium, and magnesium. The overwhelming majority of metals are present in ores (mineral-bearing substances), but a couple of such as copper, gold, platinum, and silver incessantly happen within the free state because they do not readily react with different components. Traditionally there are six different sorts of metals, particularly gold, silver, copper, iron, tin and lead.
Heavy metal, style of rock music that includes a group of associated types that are intense, virtuosic, and highly effective. Driven by the aggressive sounds of the distorted electric guitar, heavy metal is arguably the most commercially profitable style of rock music. Around the year 1200 BC some people learned to make iron instruments and weapons. These have been even harder and stronger than bronze and this was a bonus in war. … Read More