d and f BLOCK ELEMENTS

What is the maximum number of electrons that can occupy the 'd' subshell according to the Aufbau principle?

• 6
• 8
• 10
• 14

In the modern periodic table, what determines the block (s, p, d, f) to which an element belongs?

• The total number of electrons.
• The principal quantum number of the outermost shell.
• The subshell in which the last electron is placed.
• The group number.

What is the correct number of elements in the sixth period of the modern periodic table?

• 18
• 32
• 8
• 50

Which of the following properties generally increases as you move from left to right across a period in the periodic table?

• Atomic radius
• Metallic character
• Ionization enthalpy
• Electronegativity decreases

Considering the periodic trends, which of the following elements would you expect to have the smallest atomic radius?

• Sodium (Na)
• Chlorine (Cl)
• Fluorine (F)
• Potassium (K)