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.
The total number of electrons in an atom is always the same as the number of protons in the nucleus. This means atoms have no overall electrical charge. The number of protons in an atom is called its atomic number atomic number: The number of protons in the nucleus of an atom.