d and f BLOCK ELEMENTS

Which of the following is described as a 'remarkable demonstration' provided by the Periodic Table?

• That all elements are gases
• That atomic weight determines chemical properties
• That chemical elements display trends and lie in families
• That elements cannot be divided

What does the text imply about the elements with atomic numbers greater than 100?

• They are found abundantly in nature
• They are highly stable
• They are largely man-made
• They have very low atomic masses

What is the current number of known elements mentioned in the text?

• 92
• 118
• 114
• 103

According to the text, what is a significant benefit of organizing elements systematically?

• It makes elements easier to store in laboratories
• It helps predict new chemical facts and avenues of research
• It reduces the number of elements that need to be studied
• It eliminates the need for chemical experiments

Which of the following is NOT listed as a learning objective for understanding the Periodic Table in this unit?

• Classify elements into s, p, d, f blocks
• Understand the significance of atomic number
• Calculate the exact atomic mass of isotopes
• Recognize periodic trends in properties