Question: What is the atomic number for hydrogen?

Answer: TR

Question: What is the atomic number for helium?

Answer: BR

Question: What is the atomic number for oxygen?

Answer: BL

Question: What is the atomic number for Argon?

Answer: TR

Question: What is the atomic number for Astatine?

Answer: BL

Question: What is the symbol for Hydrogen?

Answer: TR

Question: What is the symbol for Lead?

Answer: BL

Question: What is the symbol for Carbon?

Answer: TR

Question: What is the symbol for Antimony?

Answer: TR

Question: Which is the most electronegative element?

Answer: TR