Understanding Mendeleev's Periodic Table

The video discusses the criteria used by Mendeleev in creating his periodic table, focusing on the use of atomic mass as a basis for arranging elements. It explains how Mendeleev believed that the chemical properties of elements are a periodic function of their atomic masses, leading to the arrangement of elements in increasing order of atomic mass.

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What was the primary criterion used by Mendeleev in creating his periodic table?

• Electron configuration

• Chemical reactivity

• Atomic mass

• Atomic number

According to Mendeleev, what is the periodic function of the elements' chemical properties?

• Atomic number

• Atomic mass

• Valency

• Density

How did Mendeleev arrange the elements in his periodic table?

• By increasing atomic number

• By decreasing atomic mass

• By alphabetical order

• By increasing atomic mass

What was a unique feature of Mendeleev's periodic table arrangement?

• Elements were arranged by decreasing atomic number

• Elements were arranged by increasing atomic mass

• Elements were grouped by state of matter

• Elements were grouped by color

Which of the following was NOT a criterion used by Mendeleev?

• Atomic mass

• Chemical properties

• Electron configuration

• Periodic function

What did Mendeleev predict about the elements based on their atomic masses?

• Their physical state

• Their chemical properties

• Their color

• Their melting point