Which of the following statements about the periodic table is true?

• A. Elements in the same group have similar chemical properties.
• B. Noble gases are found in Group 1 of the periodic table.
• C. All elements in the same period have the same number of valence electrons.
• D. Metals are located on the right side of the periodic table.

Answer: (A)

Verified step by step guidance

1. Understand the structure of the periodic table: it is arranged in rows called periods and columns called groups (or families).
2. Recall that elements in the same group have similar chemical properties because they have the same number of valence electrons, which largely determine chemical behavior.
3. Know that noble gases are located in Group 18 (the far right column), not Group 1. Group 1 contains alkali metals.
4. Remember that elements in the same period (row) have the same number of electron shells, but their number of valence electrons changes across the period.
5. Recognize that metals are generally found on the left and center of the periodic table, while nonmetals are on the right side, so metals are not located on the right side.