Worksheet formula elements

Any of the four worksheet formulas described below can be used to select every Nth data point from a data table. All four utilize the INDEX(array, row num,column num) function to select an element from the array of data, but they use different methods to calculate the pointers row num and column num into the reference that contains the data. 

Alternatively, you can use Excel s Edit Directly In Cell feature use function key F2 (Windows) or COMMAND+U (Macintosh) or double-click on the cell to enter edit mode. Excel uses colors to show range references in formulas and the corresponding ranges on the worksheet. You can use the right and left arrow keys to move through the formula, or CONTROL+(arrow key) to jump to the next element of the formula, or CONTROL+SHIFT+(arrow key) to select the next element of the formula. 

Basically, to link a chart text element to a worksheet cell, you enter a formula as the chart text. The syntax of the formula is ... 

Your worksheet should now display the atomic masses of Na and Cl in cells 12 and 13, respectively, and the number 1 in cells H2 and H3 to indicate the number of atoms of each element in the formula of NaCl. Now click on cell J1 and enter the following. 

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