All matter can be classified as either a substance or mixture. A substance is an element or a compound. A mixture is heterogeneous or homogeneous….

Summary. Pure substances are only made of one atom and the only pure substance of vanilla ice cream is sugar which is essential to taste,because without it, ice cream wouldn’t taste as sweet. Examples of mixtures in a vanilla ice cream are milk,vanilla extract,air, and eggs.

Since aluminium foil has formula “Al” that’s why it is an element not compound. Aluminium is malleable so it is beaten into very thin sheet and is made aluminium foil.

As we know that the pure substances are either elements or compounds while the mixture is a resultant product of any two or more than two substances. Therefore milk is a mixture not a pure substance. Main compounds of milk are lactose and casein.

Water is also a pure substance. Salt easily dissolves in water, but salt water cannot be classified as a substance because its composition can vary. You may dissolve a small amount of salt or a large amount into a given amount of water.

Examples of pure substances include tin, sulfur, diamond, water, pure sugar (sucrose), table salt (sodium chloride) and baking soda (sodium bicarbonate). Crystals, in general, are pure substances. Tin, sulfur, and diamond are examples of pure substances that are chemical elements. All elements are pure substances.

A pure substance is elemental by its very nature. Thus Carbon, Gold, Hydrogen are “pure substances”, elements. Chocolate is by its very nature a highly complex mixture of substances. Again, it may be pure chocolate having nothing added or removed thus making it “pure chocolate”.

Chocolate is a solid mixture. In its basic form it is composed of cacao powder, cocoa butter, and some type of sweetener such as sugar; however, modern chocolate includes milk solids, any added flavors, modifiers, and preservatives.

In chemistry, a pure substance is defined as something that is composed of only one type of particle. This means that pure substances are either elements or compounds. Everything else is a mixture. Now, coffee is neither an element nor a compound, so it is not a pure substance.

Blood is not a pure substance. Blood is made up of many different components like cells, salts, proteins, water, etc.

Urine is mostly water with dissolved bodily waste byproducts like Urea and other phosphorous containing compounds. Therefore urine is accurately described as a mixture and not a compound.

Dry ice is pure carbon dioxide making it a pure substance. Compound have specific rations, for example H2O is 2:1 –hydrogen to oxygen and CO2 is 1:2 – carbon to oxygen.

Dry ice, carbon dioxide in its solid form, a dense, snowlike substance that sublimes (passes directly into the vapour without melting) at −78.5 °C (−109.3 °F), used as a refrigerant, especially during shipping of perishable products such as meats or ice cream.

CO2

Elements and compounds are the two types of pure substances.

There are two main categories of mixtures: homogeneous mixtures and heterogeneous mixtures. In a homogenous mixture all the substances are evenly distributed throughout the mixture (salt water, air, blood).

Classifying Matter Matter can be classified into several categories. Two broad categories are mixtures and pure substances. A pure substance has a constant composition. All specimens of a pure substance have exactly the same makeup and properties.

Matter can be broken down into two categories: pure substances and mixtures. Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components. A chemical substance is composed of one type of atom or molecule.

Table sugar, or sucrose, is not a mixture. It is a compound.

A Tea is a solution of compounds in water, so it is not chemically pure. A Orange juice contains particles of solid (pulp) as well as liquid; it is not chemically pure. B Because its composition is not uniform throughout, orange juice is a heterogeneous mixture.

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. Chemistry. Atoms, elements and the periodic table.

Pure Element Examples

• Hydrogen (H) – nonmetal.
• Helium (He) – nonmetal.
• Oxygen (O) – nonmetal.
• Neon (Ne) – nonmetal.
• Nitrogen (N) – nonmetal.
• Carbon (C) – reactive nonmetal.
• Silicon (Si) – metalloid.
• Magnesium (Mg) – alkaline earth metal.

It’s a heterogeneous mixture. Diamond is made of just one element: carbon. Each carbon atom in diamond is connected to four other carbon atoms, in a crystal that extends on and on. There are other forms of pure carbon where the atoms are bonded differently, notably charcoal and graphite.

Originally Answered: What is the most expensive element and how is it found/created? The most expensive naturally occurring element in the world is francium. This is because it is very rare and it has a very short half-life-less than half an hour. Tiny amounts of francium can be found in metals such as uranium.

As of 2020, the most expensive non-synthetic element by both mass and volume is rhodium. It is followed by caesium, iridium and palladium by mass and iridium, gold and platinum by volume.

Astatine is the rarest naturally occurring element.