Element: Pure substance consisting of one type of atom. Compound: Pure substance consisting of two or more different atoms. Mixture: Two or more different substances not chemically combined. Compound formula: Represents the combination of two or more elements in fixed proportions.

Classifying Matter Matter can be classified into several categories. Two broad categories are mixtures and pure substances. A pure substance has a constant composition.

On first glance, elements and compounds might appear different, yet they share many similarities, like being made up of atoms and having bonds linking their atoms together. Elements and compounds also share the qualities of being both pure and homogeneous substances.

A compound contains atoms of different elements chemically combined together in a fixed ratio. An element is a pure chemical substance made of same type of atom. Compounds contain different elements in a fixed ratio arranged in a defined manner through chemical bonds. Elements contain only one type of atom.

A pure element or compound contains only one substance, with no other substances mixed in. Impure materials may be mixtures of elements, mixtures of compounds, or mixtures of elements and compounds.

Answer 4: The quick answer is: Diamond is a pure element, carbon; gold is a pure element, gold; and rust is a compound, Iron Oxide, of iron and Oxygen. Diamond is pure elemental carbon, compressed to its crystal form, under extreme heat and pressure deep within the Earth.

Semiconductor-grade silicon

The pure metal was first isolated by the German chemist Friedrich Wöhler in 1827. Although aluminum is the most abundant metal in the earth’s crust, it is never found free in nature. All of the earth’s aluminum has combined with other elements to form compounds.

The name aluminum is derived from the ancient name for alum (potassium aluminum sulphate), which was alumen (Latin, meaning bitter salt). Aluminum was the original name given to the element by Humphry Davy but others called it aluminum and that became the accepted name in Europe.

Aluminium is the third most abundant element, and the most abundant metal, in the Earth’s crust. The principal ore is bauxite, which contains a mixture of aluminium hydroxides.

Aluminum can be quantitatively analyzed as the oxide (formula Al2O3) or as a derivative of the organic nitrogen compound 8-hydroxyquinoline. The derivative has the molecular formula Al(C9H6ON)3.

Aluminum, Al The electronic configuration of Aluminum is (Ne)(3s)2(3p)1, and it has an atomic radius of 0.143 nm. At room temperature Aluminum has the face-centered-cubic crystal structure with a basis of one Ni atom.

It is soft and malleable. Aluminium is used in a huge variety of products including cans, foils, kitchen utensils, window frames, beer kegs and aeroplane parts. This is because of its particular properties.

Aluminum is ideal for aircraft manufacture because it’s lightweight and strong. Aluminum is roughly a third the weight of steel, allowing an aircraft to carry more weight and or become more fuel efficient. Furthermore, aluminum’s high resistance to corrosion ensures the safety of the aircraft and its passengers.

Countless objects that simplify as well as increase the quality of our daily life are partly made of aluminum, e.g. CDs, cars, refrigerators, kitchenware, electric power lines, packaging for food and medicine, computers, furniture and aircrafts. …

Aluminum is found in:

• antacids.
• dyes.
• cake mix.
• processed cheese.
• deodorants.
• baking soda/powder.
• foil.
• cookware.

Exposure to aluminum is usually not harmful, but exposure to high levels can cause serious health problems. If you think you have been exposed to high levels of aluminum, contact your doctor.