An unknown element is a nonmetal and has a valence electron configuration of ns2 np4 . a. How many valence electrons does this element have? b. What are some possible identities for this element? c. What is the formula of the compound(s) this element would form with lithium? hydrogen? magnesium? aluminum? fluorine?
Chapter 6: Energy Relationships in Chemical Reactions Energy is described as the capacity to do work Types of Energy 1. Radiant energy comes from the earth’s primary energy source, the sun 2. Thermal energy is the energy associated with the random motion of atoms and molecules 3. Chemical energy is the energy stored in the bonds of chemical substances 4. Nuclear energy is the energy stored within the neutrons and protons in the atom 5. Potential energy is the energy available by virtue of an object’s position Heat is the transfer of thermal energy between two bodies at different temperatures Thermochemistry: The study of heat change in chemical reactions The sys