legend
horizontal
legend
It is called the "key".
The legend identifies the colors that represent the bars.
A legend or key.
A chart can be saved on the same worksheet or on a separate worksheet in Excel. The easiest way to put a chart on a separate worksheet is to create your chart on the same worksheet as your data. After you create your chart, just cut and past to the worksheet where you want it to show.
legend
legend
legend
legend
It is a chart that is on a chart sheet, not embedded on a worksheet. There will be a separate tab for it, like each worksheet has.
If it is moved to be a chart on its own, that is known as a Chart Sheet, not a worksheet, and its name will be Chart1. A Chart sheet, unlike a worksheet, just has a chart and has no cells. Moving a chart from a worksheet will not affect that worksheet's name. So in this case, it would still be Sheet1. If you move a chart to another worksheet, embedding it there, that does not affect the name of that worksheet. So it could b embedded on Sheet2 or Sheet3 or whatever name may have been given to it.
This reference element is called a key.