d and f BLOCK ELEMENTS

Which of the following best explains why noble gases are generally chemically unreactive?

• They have very high ionization enthalpies.
• They have very negative electron gain enthalpies.
• They have stable, filled electron shells.
• They are located in Group 18.

Which of the following is a correct statement about the f-block elements?

• They are also known as the representative elements.
• They are also known as the transition elements.
• They are also known as the inner transition elements.
• They are located in the main body of the periodic table.

An element 'Y' forms an oxide with the formula Y₂O₃. Based on this, which group is element 'Y' most likely to belong to?

• Group 2
• Group 13
• Group 15
• Group 16

An element 'X' forms a chloride with the formula XCl. Based on this, which group is element 'X' most likely to belong to?

• Group 1
• Group 2
• Group 13
• Group 17

What is the maximum number of electrons that can be accommodated in the 'p' subshell?

• 2
• 4
• 6
• 8