A molecule is the combination of two or more atoms held together by chemical bonds. Scientists have a variety of methods and instruments to determine the composition of molecules including NMR, mass spec, HPLC and routine chromatography, spectroscopy and IR, etc.
A molecule is an electrically neutral group of at least two atoms held together by covalent chemical bonds. Molecules are distinguished from ions by their electrical charge. However, in quantum physics, organic chemistry, and biochemistry, the term molecule is often used less strictly and applied to polyatomic ions.
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 the fact that they are composed of a single non-bonded atom.
A molecule may consist of atoms of a single chemical element, as with oxygen (O2), or of different elements, as with water (H2O). 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. A large number of familiar solid substances, however, including most of the minerals that make up the crust, mantle, and core of the Earth itself, contain many chemical bonds, but are not made of identifiable molecules. No typical molecule can be defined for ionic crystals (salts) and covalent crystals (network solids), although these are often composed of repeating unit cells that extend either in a plane (such as in graphene) or three-dimensionally (such as in diamond or sodium chloride). The theme of repeated unit-cellular-structure also holds for most condensed phases with metallic bonding. In glasses (solids that exist in a vitreous disordered state), atoms may also be held together by chemical bonds without any definable molecule, but also without any of the regularity of repeating units that characterises crystals.
No, the chemical compound of the molecule doesn't change. The molecules just spread farther apart.
When a molecule freezes, the kinetic energy of that molecule decreases, and the molecules do not move as fast. It is chemically unaltered, but on the phase has changed, making it a physical change.
When two molecules have different configurations but the same atomic composition the two molecules cannot be said to have the same physio-chemical properties. In fact, a simple rearrangement, even with identical chemical formulas, can drastically change the properties of a substance.
Molecules are composed of atoms, not the other way around. The quantity of molecules needed for a component of a gas, liquid, or solid will depend upon the chemical composition and molecular structure.
A physical change hasn't an influence on the chemical composition of the molecule.
A chemical formula is representative for the molecule composition.
A molecule is the smallest unit of most chemical compounds. Scientists use a kind of shorthand called a chemical formula that shows the type and number of elements in a molecule. For example, a water molecule is written as H2O, which means there are 2 atoms of Hydrogen and 1 atom of Oxygen.
2 hydrogen molecules, 1 oxygen molecule (H2O)
No, the chemical compound of the molecule doesn't change. The molecules just spread farther apart.
The chemical composition of water is two hydrogen molecules and one oxygen molecule. The assignment was to write a five paragraph composition about the founding of our country.
A chemical change occur when the chemical composition of the molecule is changed.
When a molecule freezes, the kinetic energy of that molecule decreases, and the molecules do not move as fast. It is chemically unaltered, but on the phase has changed, making it a physical change.
cuz they are dead moleculesType your answer here...
From one molecule of glucose (sugar) you can obtain two molecules of ethanol. Glucose's chemical composition is C6H12O6 Carbon dioxide (Co2) is lost in the fermentation process so we are left with 2C2H5OH or two ethanol molecules! Hope it helps!
When two molecules have different configurations but the same atomic composition the two molecules cannot be said to have the same physio-chemical properties. In fact, a simple rearrangement, even with identical chemical formulas, can drastically change the properties of a substance.
Molecules
Molecules are composed of atoms, not the other way around. The quantity of molecules needed for a component of a gas, liquid, or solid will depend upon the chemical composition and molecular structure.