Galvanising

1 Answer. (c) Options (i) Melting of iron metal, (iii) Bending of an iron rod and (iv) Drawing a wire of iron metal are physical changes, because in three processes, iron changes its form,not the chemical composition.

Rusting is an example of a chemical change. A chemical property describes the ability of a substance to undergo a specific chemical change. A chemical property of iron is that it is capable of combining with oxygen to form iron oxide, the chemical name of rust.

Rusting is an oxidation reaction. The iron reacts with water and oxygen to form hydrated iron(III) oxide, which we see as rust. Iron and steel rust when they come into contact with water and oxygen – both are needed for rusting to occur.

Metals are acidic. Rust is iron oxide. Metallic oxides are basic in nature. This means rust is base.

Iron, one of the most abundant elements on Earth, helped give rise to entire civilizations and is the key ingredient in steel, without which many of our modern structures would not be standing. The story of iron’s origins is astronomical, and it begins with the element being born from the explosion of stars.

So all of our iron is from the Earth’s formation or meteor impacts since then. All the material that eventually formed our solar system is essentially recycled star dust. So we have high iron planets and meteors close to the sun (relatively speaking), and very little iron in the “gas giants” part of the solar system.

Nowadays, we tend to use iron to create steel, often used in manufacturing and civil engineering. Stainless steel, which is highly resistant to corrosion, it’s commonly used in kitchen cutlery, appliances and cookware – it’s also used for hospital equipment.

Origin of name : from the Anglo-Saxon word “iron” or “iren” (the origin of the symbol Fe comes from the Latin word “ferrum” meaning “iron”). Possibly the word iron is derived from earlier words meaning “holy metal” because it was used to make the swords used in the Crusades..

Uses of iron

• It is used to manufacture steel and also used in civil engineering like reinforced concrete, girders etc.
• Iron is used to make alloy steels like carbon steels with additives such as nickel, chromium, vanadium, tungsten, and manganese.

27 Iron Facts for Kids

• Iron is a chemical element on the periodic table.
• Pure iron is a soft metal with a grayish color.
• Iron was most likely first discovered before the 5th millennium BC (5000 BC).
• Iron is a solid at room temperature.
• The symbol for iron is Fe.
• The atomic number for iron is 26.

Iron is a “special” element because of its nuclear binding energy. The very basic idea is that when you fuse two light elements together, you get a heavier element plus energy. Similarly, if you have a heavy element that undergoes fission and splits into two lighter elements, you also release energy.