A chemical compound composed of more than one element. A molecule is the smallest particle in a chemical element or compound that has the chemical properties of that element or compound. Molecules are made up of atom s that are held together by chemical bonds.
Hydrogen and oxygen are elements. What that really means is that when an atom, the fundamental unit that makes up everything, has 1 proton (a positively charged sub-atomic particle) it is a hydrogen atom, and when it has 8 protons, it is an oxygen atom. Hydrogen gas is two hydrogen atoms bonded together, H 2. The terms molecule, compound, and atom can be confusing! Here's an explanation of what a molecule is (and is not) with some examples of common molecules. Answer: Molecules form when two or more atoms form chemical bonds with each other. It doesn't matter if the atoms are the same or are different from each other. A single oxygen, O, is not a molecule. When oxygen bonds to itself (e.g., O 2, O 3) or to another element (e.g., carbon dioxide or CO 2), molecules are formed. Types of Chemical Bonds. List of Diatomic Molecules. By Anne Marie Helmenstine, Ph.D. Water, is one oxygen atom bonded to two different hydrogen atoms, H 2 O. When atoms are bonded together, (H 2, O 2, H 2 O etc.) we call the total structure a molecule. Hydrogen atoms and oxygen atoms are found in many different molecules, and these different molecules make up, solids, liquids, and gasses. Whether a material is a solid, liquid, or gas depends on how these molecules (made up of atoms) interact with each other. What that really means is that when an atom, the fundamental unit that makes up everything, has 1 proton (a positively charged sub-atomic particle) it is a hydrogen atom, and when it has 8 protons, it is an oxygen atom. Hydrogen gas is two hydrogen atoms bonded together, H 2. Part of the Computing fundamentals glossary: A molecule is the smallest particle in a chemical element or compound that has the chemical properties of that element or compound. Molecules are made up of atom s that are held together by chemical bonds. For example, O 2 is the oxygen molecule most commonly found in the earth's atmosphere; it has two atoms of oxygen. However, under certain circumstances, oxygen atoms bond into triplets (O 3), forming a molecule known as ozone. The element helium is a one-atom molecule. Some molecules consist of two atoms of the same element. For example, O 2 is the oxygen molecule most commonly found in the earth's atmosphere; it has two atoms of oxygen. However, under certain circumstances, oxygen atoms bond into triplets (O 3), forming a molecule known as ozone. In the kinetic theory of gases, the term molecule is often used for any gaseous particle regardless of its composition. According to this definition, noble gas atoms are considered molecules despite being composed of a single non-bonded atom. Atoms and complexes connected by non-covalent bonds such as hydrogen bonds or ionic bonds are generally not considered single molecules. Molecules as components of matter are common in organic substances (and therefore biochemistry). They also make up most of the oceans and atmosphere. Here are examples of common molecules : Molecules made up of two or more elements are called compounds. Water, calcium oxide, and glucose are molecules that are compounds. All compounds are molecules; not all molecules are compounds. Single atoms of elements are not molecules. A single oxygen, O, is not a molecule. When oxygen bonds to itself (e.g., O 2, O 3) or to another element (e.g., carbon dioxide or CO 2), molecules are formed. Types of Chemical Bonds. List of Diatomic Molecules. By Anne Marie Helmenstine, Ph.D. Answer by Dominus armum. Confidence votes 203. A water molecule (formula H2O) consists of one oxygen atom covalently bonded (joined by sharing of electrons) to two hydrogen atoms. It has the shape of Mickey Mouse's head, with the hydrogens being the ears and the oxygen the head itself A molecule may be homonuclear, that is, it consists of atoms of a single chemical element, as with oxygen (O 2); or it may be heteronuclear, a chemical compound composed of more than one element, as with water (H 2 O). Atoms and complexes connected by non-covalent bonds such as hydrogen bonds or ionic bonds are generally not considered single molecules. Molecules as components of matter are common in organic substances (and therefore biochemistry). They also make up most of the oceans and atmosphere.
http://scienceline.ucsb.edu/getkey.php?key=2894 http://chemistry.about.com/od/moleculescompounds/f/What-Is-A-Molecule.htm http://scienceline.ucsb.edu/getkey.php?key=2894 http://whatis.techtarget.com/definition/molecule http://whatis.techtarget.com/definition/molecule https://en.wikipedia.org/wiki/Molecule http://chemistry.about.com/od/moleculescompounds/f/What-Is-A-Molecule.htm http://www.answers.com/Q/What_makes_up_a_water_molecule https://en.wikipedia.org/wiki/Molecule
what makes a molecule