d and f BLOCK ELEMENTS

What was a significant consequence of Mendeleev placing iodine correctly based on its properties?

• It proved atomic weights were always correct.
• It made the table symmetrical.
• It simplified the table's structure.
• It demonstrated the importance of chemical behavior over strict atomic weight sequence.

How did Mendeleev's approach differ from simply arranging elements by increasing atomic weight?

• He arranged them by decreasing atomic weight.
• He only considered physical properties.
• He arranged them alphabetically.
• He prioritized grouping elements with similar properties even if it meant deviating from strict atomic weight order.

What did Mendeleev mean by stating that element properties are a periodic function of atomic weights?

• Properties increase linearly with atomic weights.
• Properties are unrelated to atomic weights.
• Properties decrease with atomic weights.
• Properties repeat in a predictable pattern as atomic weights increase.

Why is Dmitri Mendeleev often credited more than Lothar Meyer for the periodic table?

• Meyer's table was less accurate.
• Mendeleev discovered more elements.
• Mendeleev was the first to use atomic weights.
• Mendeleev published his periodic table and law before Meyer.

What limitation did John Newlands' Law of Octaves have?

• It ignored atomic weights.
• It only worked for metals.
• It was based on alphabetical order.
• It assumed all periods had the same length.