Questions and Answers
What is the periodic law?
What did Dmitri Mendeleev use to predict properties of missing elements in his periodic table?
In which direction does metallic character generally increase in the periodic table?
Where does nonmetallic character generally increase in the periodic table?
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What illuminated the internal structure of the atom in the early 20th century?
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Study Notes
Periodic Law and Table
- The periodic law states that the properties of elements recur periodically when the elements are arranged in order of their atomic weights.
- Dmitri Mendeleev used the periodic law to predict properties of missing elements in his periodic table, which was based on the recurring patterns of elements' properties.
Periodic Trends
- Metallic character generally increases in the periodic table from top to bottom in a group and from right to left in a period.
- Nonmetallic character generally increases in the periodic table from bottom to top in a group and from left to right in a period.
Atomic Structure
- The internal structure of the atom was illuminated in the early 20th century by the discovery of subatomic particles such as electrons, protons, and neutrons.
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Description
Test your knowledge of the periodic table with this quiz that covers the arrangement of chemical elements, the periodic law, and the significance of the table in chemistry and other sciences.
