The connections between the atoms in a compound are called chemical bonds. They involve the reaction between a hydrogen atom and an electronegative atom. The strength of a hydrogen bond is less than a tenth of a covalent bond.
Chemical reactions are important to all levels of biology. In the simplest terms, a reaction requires reactants and products. Reactants are the atoms or molecules that are involved with the change, and products are the resulting changed atoms or molecules. In most biological reactions, enzymes act as catalysts to increase the rate of a reaction. Covalent bonds occur when two or more atoms share their electrons. The electrons are not donated/accepted; instead, they incorporate their orbitals to create an electron cloud around all participating atoms. A chemical bond is an attraction between atoms that allows the formation of chemical substances that contain two or more atoms. The bond is caused by the electrostatic force of attraction between opposite charges, either between electrons and nuclei, or as the result of a dipole attraction. The strength of chemical bonds varies considerably; there are strong bonds such as covalent or ionic bonds and weak bonds such as Dipole-dipole interaction, the London dispersion force and hydrogen bonding. A molecule is two or more atoms linked by a chemical bond. Molecules can contain different types of bonds. If atoms are sharing electrons, then the bond between them is covalent. If an atom gives up an electron to another atom, then they have an ionic bond. Methane has four covalent bonds between carbon (C) and hydrogen (H). 1 Chemical reactivity of molecules-tendency to break and form chemical bonds. 2  Biology of molecules-size and shape of molecules, and the nature of weak interactions with other molecules. Main Types of Chemical Bonds. The two main types of bonds formed between atoms are ionic bonds and covalent bonds. An ionic bond is formed when one atom accepts or donates one or more of its valence electrons to another atom. A covalent bond is formed when atoms share valence electrons. When electrons are shared by two metallic atoms a metallic bond may be formed. In a covalent bond, electrons are shared between two atoms. The electrons that participate in metallic bonds may be shared between any of the metal atoms in the region. Chemical Bonds. The connections between the atoms in a compound are called chemical bonds. Atoms form bonds by sharing their electrons with each other, relying on the power of electric charge to keep themselves attached. Molecules and compounds can also bond with each other. Important bonds between atoms are covalent and ionic bonds. Bonds between molecules or ... Bonds between molecules or compounds are called dipole-dipole bonds. Covalent bonds. Bonds formed through the more or less equal sharing of electrons between atoms are known as covalent bonds. If the electrons in a covalent bond are shared equally, the resulting bond is called a nonpolar covalent bond. Hydrogen Bonds-Hydrogen bonds are less of chemical bonds and are more of a static attraction. They involve the reaction between a hydrogen atom and an electronegative atom. The strength of a hydrogen bond is less than a tenth of a covalent bond. Hydrogen bonds are considerably weak when compared to others, but these weak chemical interactions are very important in the world of biology, dues to the fact that the molecules they form can be easily taken apart and put back together again. chemical bonds-connects atoms in a molecule and molecules in a compound. 1  ionic bonds-forms between atoms of opposite charge; exists between an ion and all oppositely charged ions in the area. 2  covalent bonds-forms between 2 specific atoms when electrons are shared; has no net charge or free electrons.  hydrogen bond-a chemical bond consisting of a hydrogen atom between two electronegative atoms (e.g., oxygen or nitrogen) with one side be a covalent bond and the other being an ionic bond. attraction, attractive force-the force by which one object attracts another. covalent bond-a chemical bond that involves sharing a pair of electrons between atoms in a molecule. cross-link, cross-linkage-a side bond that links two adjacent chains of atoms in a complex molecule.
http://www.infoplease.com/cig/biology/chemical-reactions-ionic-covalent-polar-covalent-bonds.html https://en.wikipedia.org/wiki/Chemical_bond http://www.biology.arizona.edu/biochemistry/tutorials/chemistry/page2.html http://chemistry.about.com/od/chemicalbonding/a/chemicalbonds.htm http://www.sparknotes.com/testprep/books/sat2/biology/chapter5section2.rhtml http://www.brighthubeducation.com/science-homework-help/121309-understanding-the-use-of-chemical-bonds-in-chemistry/ http://www.course-notes.org/biology/topic_notes/nature_of_molecules/atoms_and_chemical_bonds http://www.thefreedictionary.com/chemical+bond
what are chemical bonds in biology