"Chemistry song 08" joke

Test Tubes Bubbling
(to the tune of "Chestnuts Roasting On An Open Fire")
Test tubes bubbling in a water bath
Strong smells nipping at ypur nose.
Tiny molecules with their atoms all aglow
Will find it hard to be inert tonight.
They know that Chlorine's on its way
He's loaded lots of little electrons on his sleigh
And every student's slide rule is on the sly
To see if the teacher really can multiply.
And so I offer you this simple phrase
To chemistry students in this room
Although it's been said many times, many ways
Merry molecules to you.