Which term is used to refer to the columns of the periodic table?

• A. Groups
• B. Periods
• C. Families
• D. Blocks

Answer: (A)

Verified step by step guidance

1. Understand that the periodic table is organized into vertical columns and horizontal rows.
2. Recall that the horizontal rows of the periodic table are called 'Periods'.
3. Recognize that the vertical columns of the periodic table are commonly referred to as 'Groups'.
4. Note that 'Families' is another term sometimes used interchangeably with 'Groups' to describe the columns, emphasizing similar chemical properties.
5. Identify that 'Blocks' refer to sections of the periodic table based on electron configurations (s, p, d, f blocks), not columns.