Period!
_______ is the symbol for Phosphorus
What is P?
_______ is the symbol for sulfur
What is S?
_______ is the symbol for Plutonium
What is Pu?
_______ is the symbol for Potassium
What is K?
_______ is the symbol for Strontium
What is Sr?
_______ is the symbol for Selenium
What is Se?
_______ is the symbol for Thallium
What is Tl?