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Questions and Answers
Which of the following statements about the periodic table is true?
Which of the following statements about the periodic table is true?
- The periodic table is divided into three rectangular areas.
- The periodic table arranges elements into rows and columns. (correct)
- The periodic table is used only in chemistry.
- The periodic table was first formulated by Dmitri Mendeleev in 1969.
What does the periodic law state?
What does the periodic law state?
- Elements with lower atomic numbers have different properties.
- Elements in the same group have different chemical characteristics.
- Elements in the same period have similar chemical characteristics. (correct)
- Elements with higher atomic numbers have different properties.
Which direction does metallic character generally increase in the periodic table?
Which direction does metallic character generally increase in the periodic table?
- From bottom to top within a group.
- From top to bottom within a group. (correct)
- From left to right across a period.
- From right to left across a period.
What characterizes the trends in the periodic table?
What characterizes the trends in the periodic table?
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Who formulated the first generally accepted periodic table?
Who formulated the first generally accepted periodic table?
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Study Notes
Periodic Table Characteristics
- The periodic law states that the properties of elements recur periodically when the elements are arranged in order of their atomic numbers.
- Metallic character generally increases from top to bottom and from right to left in the periodic table.
- Trends in the periodic table are characterized by periodic variations in properties, such as atomic radius, electronegativity, and electron affinity, when elements are arranged in order of their atomic numbers.
History of the Periodic Table
- The first generally accepted periodic table was formulated by Dmitri Mendeleev.
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