Quick-Start Guide. When you enter an equation into the calculator, the calculator will begin by expanding (simplifying) the problem. Next, it will attempt to solve the equation by using one or more of the following: addition, subtraction, division, factoring, and completing the square.uick-Start Guide. When you enter an equation into the calculator, the calculator will begin by expanding (simplifying) the problem. Next, it will attempt to solve the equation by using one or more of the following: addition, subtraction, division, factoring, and completing the square.
Molecular formulas describe the exact number and type of atoms in a single molecule of a compound. The constituent elements are represented by their chemical symbols, and the number of atoms of each element present in each molecule is shown as a subscript following that element's symbol.
Also be able to determine the number of electrons in each energy level of an atom if you know the total number of electrons present. 20 Objective 4  The number of protons in an atom is called the atomic number. All atoms of the same element ALWAYS have the same atomic number.