Get the definition of bond energy. Learn how it relates to the strength of a chemical bond and how energy changes when bonds break and form.| Science Notes and Projects
Learn about valence electrons. Get the definition and a periodic table showing the number of valence electrons for each element.| Science Notes and Projects
Learn about the octet rule in chemistry. Get the definition, see examples, and learn about exceptions to the rule.| Science Notes and Projects
The nonmetal elements occupy the upper righthand corner of the periodic table. This is a list of the nonmetals in order of increasing atomic number.| Science Notes and Projects
Learn the difference between ionic and covalent bonds. See examples of the two types of chemical bonding and how to predict which type of bond will form.| Science Notes and Projects
Learn what noble gases are, which elements are included in the group, and what properties distinguish a noble gas from other element of the periodic table.| Science Notes and Projects
Learn what an electron is. Get its definition, learn where to find electrons, and understand the properties of this type of matter.| Science Notes and Projects
Learn about the types of chemical bonds and get examples of ionic, covalent, metallic, and hydrogen bonding in chemistry.| Science Notes and Projects
Get the covalent bond definition and examples in chemistry. Learn about the different types of covalent bonds and which elements participate.| Science Notes and Projects
Learn what an exothermic reaction is and get examples of exothermic reaction, including simple demonstrations you can try.| Science Notes and Projects
The atom is the unit of matter that identifies a chemical element. Here are 10 interesting atom facts for education and entertainment.| Science Notes and Projects