The molecule's properties, particularly its reactivity, is greatly determined by its molecular geometry.
The electrons (conceived as "electron clouds," not discrete particles) are said to occupy certain energy levels ("orbitals") within the molecule.
The molecular formula of a substance can be used to calculate the molecular mass—that is, the mass of each molecule of the substance.
Most molecules are too small to be seen with the naked eye, but their images can be observed by the technique of electron microscopy.
Other diatomic molecules, such as carbon monoxide (CO), consist of atoms of two different elements.
Philosophers such as Ernst Mach in the school of logical positivism also strenuously resisted the idea that molecules could really exist.
Under standard conditions (25° C, 100 kPa), molecules range in size from a few to several dozen Е.
To visualize how molecules look in three dimensions, chemists use molecular models.
By analyzing the spectrum of energy that is absorbed or emitted by the molecules, or the fragments released or chemical changes produced, scientists can determine the composition and molecular structures of substances.
Two (or more) substances may be made up of molecules that share the same molecular formula but with different molecular structures.
Each molecule has a fixed "equilibrium geometry"—consisting of its bond lengths and angles—about which the atoms continuously oscillate through vibrational and rotational motions.
Molecular geometry, or molecular structure, is the three-dimensional arrangement of the atoms that constitute a molecule.
The structures and functions of substances can be attributed to the physical and chemical interactions of their atoms and molecules.
The concept of molecules was first introduced in 1811 by Amadeo Avogadro and was accepted by many chemists based on Dalton's laws of Definite and Multiple Proportions (1803-1808).
The empirical formula of a chemical is a simple expression of the relative number of each type of atom in each molecule of the substance.
The science of molecules is called molecular chemistry or molecular physics, depending on the focus.
Large molecules—such as DNA, RNA, and proteins—are described as macromolecules.
The term unstable molecule is used for a very reactive, short-lived species, such as a "radical" or "molecular ion."
Molecular spectroscopy is a technology that is extremely useful for determining the structural features of molecules of a substance.
A molecule may be composed of atoms of a single element or two or more elements joined in a fixed ratio.
The molecular mass is the sum of masses of all the atoms in the molecule.
The smallest molecule is that of hydrogen (H2).
The molecular formula of a compound reflects the exact number and types of atoms that make up each molecule of the compound, using the chemical symbols for the elements.
In chemistry, a molecule is an entity comprising two or more atoms held together by natural forces in a definite spatial arrangement.
A number of diatomic molecules are composed of two atoms of the same element.
The molecules may respond in various ways: (a) by absorbing the radiation (absorption spectroscopy); (b) by emitting another signal (emission spectroscopy); (c) by fragmentation; or (d) by chemical changes.
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 atoms that are held together by chemical bonds. These bonds form as a result of the sharing or exchange of electrons among atoms.
Protons, neutrons, and electrons can then organize to form atoms. Atoms are then used to create the molecules around us. As we just learned, there are almost 120 elements that can be found in the molecules we know. Smaller molecules can work together and build macromolecules.
A molecule is formed when two or more atoms join together chemically. A compound is a molecule that contains at least two different elements. All compounds are molecules but not all molecules are compounds. ... The smallest bit of each of these substances would be referred to as a molecule.Feb 2, 2013
A molecule is two or more atoms bonded together chemically. An atom is the most basic unit of matter. When atoms are chemically bonded together with covalent bonds, molecules are formed. Molecules can be very small like water molecules or extremely large like proteins such as hemoglobin.
Well, if a molecule is considered to be a discrete small unit made up of atoms joined together, then NaCl, and any other ionic solid is not really a molecule. In NaCl we have a repetitive crystal structure in which each Na+ ion is surrounded by Cl- ions, and vice-versa, for as far as the crystal extends.