Moving between workspaces

In Linux if Alt+Ctrl+KeyPad# is issued from a Bash shell, will
a user then be able to invoke Firefox commands to Firefox from a Bash shell?
Would one be able to issue another Alt+Ctrl+Key# to return to the initial workspace containing the Bash script?
How do Alt+Ctrl+KeyPad# and Ctrl+F# shortcuts differ in action if issued from a Bash script?