Kathy,
I am rearranging the steps shown by Marcelo.
1. Right click on the worksheet tab you intend to email.
2. Select "move or copy"
3. In the window, from the drop down list select "New Book".
4. Then Check the "Create a Copy" check box.
By doing this the exist sheet will not be separated but a new workbook with
the specified sheet will be generated as book 1 and the original workbook
would be intact.
You can then email the entire work book as an attachment.