d and f BLOCK ELEMENTS

What significant contribution did Lothar Meyer make in relation to the Periodic Law?

• He discovered the noble gases
• He proposed the nuclear model of the atom
• He plotted physical properties against atomic weight
• He arranged elements by atomic number

Which two scientists are primarily credited with the development of the Periodic Law as we know it today?

• Johann Dobereiner and John Newlands
• Dmitri Mendeleev and Lothar Meyer
• Antoine Lavoisier and Joseph Proust
• Ernest Rutherford and Niels Bohr

Up to which element did Newlands' Law of Octaves seem to hold true?

• Sodium
• Potassium
• Calcium
• Barium

What analogy did Newlands use to describe the recurring properties in his Law of Octaves?

• Planetary orbits
• Musical octaves
• Geometric progressions
• Harmonic series

What term did Dobereiner use for groups of three elements with similar properties where the middle element's atomic weight was intermediate?

• Groups
• Octaves
• Triads
• Families