They are chemical elements , which mostly tend to be solid, (with the exception of mercury), when kept at room temperature .
Three-quarters of the periodic table has been determined to be metals, so it is easy to identify a nonmetal.
They are solid with a notoriously high melting point and some of them are transformed into thin sheets and thin tubes .
The metal representation is quite diversified, it is not something easy to define exactly.
Characteristics of metals
- They reflect light in a characteristic way.
- They have a high density .
- Most tend to come from minerals including the earth’s crust or sea water.
- Certain metals exhibit magnetism .
- They are good conductors of heat and electricity .
- They are usable in the field of medicine , like titanium, gold and stainless steel.
- It has the ability to resist repeated energies, flexibility and malleability .
- The noble metals are characterized by pure metals because they are not reactive and do not conform with other components to create other compounds.
- The noble metals contain: silver, palladium, platinum, gold and copper.
- Not all metals have reactivity.
- The alkali metals are highly reactive , exhibit a very low melting point and are soft enough to be cut with a blade.
- Potassium and sodium are alkali metals .
- The alkaline earth metals tend to be less reactive than the alkali metal, are more rigid, and have a fairly high melting point.
- Magnesium, calcium, and barium are alkaline earth metals .
- Sodium and potassium are the most reactive elements.