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Questions and Answers
What was the main criterion used by Mendeleev to organize the elements in his periodic table?
What was the main criterion used by Mendeleev to organize the elements in his periodic table?
- Increasing atomic number
- Chemical reactivity
- Physical state
- Increasing atomic mass (correct)
The modern periodic table organizes elements based on their atomic mass.
The modern periodic table organizes elements based on their atomic mass.
False (B)
Who compiled the first comprehensive list of elements in the late 18th century?
Who compiled the first comprehensive list of elements in the late 18th century?
Lavoisier
As of now, there are a total of __________ known elements.
As of now, there are a total of __________ known elements.
Match the following historical milestones with their corresponding details:
Match the following historical milestones with their corresponding details:
Flashcards
Periodic Table
Periodic Table
A table that organizes elements, showing recurring patterns in their properties.
Mendeleev's contribution
Mendeleev's contribution
Developed the periodic table in 1871, arranging elements by increasing atomic mass and similar properties.
Atomic number
Atomic number
The number of protons in an atom's nucleus.
Atomic mass
Atomic mass
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Periodic Pattern
Periodic Pattern
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