metals

Alloys
An Alloy is a mixture of two or more elements, which means one or multiple has to be a metal.
Alloys often have properties that are different from the metal they contain. this makes them more useful than the metals alone. For example, steel is an alloy of iron and carbon. it's used to make many things.. such as cars, ships, and even bridges. Steel is stronger and flexible and harder than iron and doesn't corrode (rust) as quickly. Back to Alloys, so combining the metallic elements such as gold and copper, produces red gold, gold and silver become white gold and silver combined with copper produces sterling silver.
Recent advances in technology have created a new range of alloys called smart alloys, smart alloys have unusual properties. nitinol is an alloy of nickel and titanium and is also known as a shape memory alloy. If nitinol is bent out of shape, it returns to its original shape when its either heated or an electric current is passed through it.


Metal Carbonates and acid

When a metal carbonate reacts with some sort of an acid, it will form a salt... Carbon dioxide and water. Carbon dioxide is a gas and can be seen as bubbles as the reaction proceeds.


Corrosion

When metals are exposed to the environment they can deteriorate, or break down. Scientists call this process corrosion. Rust is the term used to describe the corrosion of iron. Iron is a somewhat cheap metal so it is widely used in the industry. Scientists have had to develop a way of protecting the iron from rusting.




Chemical equations: metal + acid

When a metal reacts with an acid, a metal salt and hydrogen gas are produced. The type of sale produced depends on the type of metal and the type of acid used.

ACID                                      SALT FORMED

sulfuric acid                              sulfate

hydrochloric acid                      chloride

nitric acid                                  nitrate