What is a compound of an element?
What is an element? Elements are substances (like hydrogen and oxygen) that can't be split into simpler substances. A substance like water, that is made up of two or more elements, is called a compound. What is a compound? Compounds are usually very different from the elements that have combined together to make them.
Different elements combine to make a compound. That means, hydrogen can combine with oxygen to create a compound called 'Water'. A compound is 'impure', that means it contains more than one type of atom. When a group of atoms combine, they create a molecule.
- Atoms, elements, and compounds are all pure substances. A pure substance is made of only one type of particle. This contrasts mixtures, which are made of more than one pure substances that do not chemically combine. An atom is the smallest unit of matter.
- Elements combine to form chemical compounds that are often divided into two categories. Metals often react with nonmetals to form ionic compounds. These compounds are composed of positive and negative ions formed by adding or subtracting electrons from neutral atoms and molecules.
- A compound is a molecule that contains at least two different elements. All compounds are molecules but not all molecules are compounds. Molecular hydrogen (H2), molecular oxygen (O2) and molecular nitrogen (N2) are not compounds because each is composed of a single element.
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.
- 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.
- A compound is a pure substance composed of two or more different atoms chemically bonded to one another. A compound can be destroyed by chemical means. It might be broken down into simpler compounds, into its elements or a combination of the two.
- The elements in any compound are always present in fixed ratios. Example 1: Pure water is a compound made from two elements - hydrogen and oxygen. The ratio of hydrogen to oxygen in water is always 2:1. Each molecule of water contains two hydrogen atoms bonded to a single oxygen atom.
Updated: 2nd October 2019