Please choose the correct answer to the question: Which sentence about the periodic table of elements is true?

Answer1: All elements in period 2 are metals. Answer2: All elements in group 18 are metals. Answer3: Metals are found on the left side of the periodic table. Answer4: Metals are found on the right side of the periodic table.

Answer format: answer1/answer2/answer3/answer4
Answer: answer3