Multiple Choice
How many elements are currently recognized in the modern periodic table?
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2. Atoms & Elements
Periodic Table: Classifications
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Which term is used to describe the rows of the periodic table?
A
Families
B
Groups
C
Blocks
D
Periods
Verified step by step guidance1
Understand that the periodic table is organized both horizontally and vertically to group elements with similar properties.
Recognize that the vertical columns in the periodic table are called 'Groups' or 'Families', which contain elements with similar chemical behavior.
Know that the horizontal rows in the periodic table are called 'Periods', which represent elements with increasing atomic number and changing properties across the row.
Identify that 'Blocks' refer to sections of the periodic table based on electron configurations (s, p, d, f blocks), not rows or columns.
Therefore, the term used to describe the rows of the periodic table is 'Periods'.
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