Helium
Curium
Lutetium (Lieutenant)
Barium
Sex???
I am Sam, I am Sam, Sam I am! This pun is based on the element samarium (chemical symbol: Sm) in the periodic table.
You "barium" in confidence.
The answer to the periodic table element pun "A nice guy" is Nickel, whose chemical symbol is Ni.
470 patients per doctor
Barium !!
A Trojan.
The answer is "Zinc" (sink).
The answer is "Element K" which is potassium (K) on the periodic table.
A good joke for your pun a brr-apple is: Doctor, Why do apples look like a bed? Brr-apple