Hydrogen, oxygen and nitrogen are counted as some most important elements and found abundantly. About 75% of this universe is composed of hydrogen and helps different other matters to sustain. Large starts and planets, electrons and protons are also composed of hydrogen.
A sheet tab appears at the bottom of your worksheet. It has the name of the worksheet on it, which can be changed and you can also change its colour. This can be done by right clicking on it and picking the option from the shortcut menu that appears. By clicking a sheet tab, you can make that sheet the active sheet so that you can work on it.
Add a check box (ActiveX control). If the Developer tab is not available, display it. Display the Developer tab. Click the Microsoft Office Button, and then click Excel Options. In the Popular category, under Top options for working with Excel, select the Show Developer tab in the Ribbon check box, and then click OK.