Diatomic Molecule: A molecule that contains only two atoms. All of the noninert gases occur as diatomic molecules; e. G. Hydrogen, oxygen, nitrogen, fluorine, and chlorine are H2, O2, N2, F2, and Cl2, respectively.

 

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Diatomic Molecule: A molecule that contains only two atoms. All of the noninert gases occur as diatomic molecules; e. G. Hydrogen, oxygen, nitrogen, fluorine, and chlorine are H2, O2, N2, F2, and Cl2, respectively.

Polar Molecule: An asymmetric molecule containing polar bonds. H2O, NH3, and hcl are examples of polar molecules. Non-examples are CO2, ccl4, and bcl3 which contain polar bonds but are nonpolar because they . . . View Full Definition

Recombinant Dna Molecules: New combinations of DNA fragments formed by cutting DNA segments from two sources with restriction enzyme and then joining the fragments together with DNA ligase. Interspecies transfer of ge . . . View Full Definition

Polyatomic Molecule: A polyatomic molecule is an uncharged particle that contains more than two atoms.

Nonpolar Molecule: A molecule in which the center of positive charge and the center of negative charge coincide. Examples are ccl4 and CO2; counterexamples are chcl3 and H2O.

Molecules: Units of two or more atoms held together by chemical bonds. The combination of atoms by chemical bonds with the component atoms in definite porportions, such as water (two H to one O).

Macromolecules: Large molecules made up of many small organic molecules that are often referred to as monomers; e.g., carbohydrates, lipids, proteins, and nucleic acids. Macromolecules are polymers of monomers.

Molecule: The smallest particle of an element or compound that retains the chemical properties of the element or compound. A molecule is a collection of chemically bound atoms with characteristic comp . . . View Full Definition

Oxygen (O): Atomic number: 8, Atomic mass: 15.999 g.mol -1, Electronegativity: 3.5, Density: 1.429 kg/m3 at 20°C, Melting point: -219 °C, Boiling point: -183 °C, Vanderwaals radius: 0.074 nm, Ionic radi . . . View Full Definition

Hydrogen (H): Atomic number: 1, Atomic mass: 1.007825 g.mol -1, Electronegativity: 2.1, Density: 0.0899*10 -3 g.cm -3 at 20 °C, Melting point: - 259.2 °C, Boiling point: - 252.8 °C, Vanderwaals radius: 0. . . . View Full Definition