Modern Periodic Table

The video tutorial discusses the development of the periodic table, starting with Mendeleev's classification of elements based on atomic weight and properties. It highlights the limitations of Mendeleev's table, such as the placement of elements with higher atomic weights before those with lower weights and the lack of space for noble gases and isotopes. The modern periodic law, which arranges elements by atomic number and electronic configuration, is introduced. The video also explains the IUPAC naming system for newly discovered elements, using numerical roots to derive names based on atomic numbers.

What was the basis of Mendeleev's periodic law?

• Quantum numbers

• Electronic configuration

• Atomic weight

• Atomic number

Which of the following elements was placed before an element with a lower atomic weight in Mendeleev's table?

• Mercury before Copper

• Argon before Potassium

• Nickel before Cobalt

• Potassium before Argon

What determines the properties of elements in the modern periodic table?

• Position in the table

• Atomic number and electronic configuration

• Number of neutrons

• Atomic weight

Which orbital is filled in the lanthanide series?

• 3d orbital

• 4f orbital

• 5d orbital

• 6s orbital

Which of the following is NOT a feature of the modern periodic table?

• Isotopes have separate places

• Elements with similar properties are in the same group

• Elements are arranged by atomic number

• Lanthanides and actinides are placed separately

How is the IUPAC name for a new element derived?

• By using the element's color

• By the element's atomic weight

• By combining numerical roots of its atomic number

• By the element's discovery location

What is the IUPAC name for an element with atomic number 106?

• Unniloctium

• Unnilhexium

• Unnilseptium

• Unnilpentium