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.
About Property Sheets. A property sheet is a window that allows the user to view and edit the properties of an item. For example, a spreadsheet application can use a property sheet to allow the user to set the font and border properties of a cell or to view and set the properties of a device, such as a disk drive, printer, or mouse. This section discusses the following topics.