Newlands Octave Law Concepts

The video explains Newlands Octave Law, which arranges elements by increasing atomic mass, showing that every eighth element shares properties with the first. It highlights Dobereiner's triads and discusses the limitations of the law, such as its applicability only up to calcium and the incorrect placement of elements like iron, cobalt, and nickel. The law's discovery in 1866 and its musical analogy are also covered.

Who classified elements and arranged them in increasing order of their atomic masses?

• Ernest Rutherford

• Dmitri Mendeleev

• Henry Moseley

• John Newlands

What did Newlands observe about the properties of every 8th element?

• They were similar to the 2nd element

• They were completely different from the 1st element

• They were similar to the 7th element

• They were similar to the 1st element

Which element did Newlands place below hydrogen due to similar properties?

• Sodium

• Fluorine

• Oxygen

• Lithium

What is the main idea of Newlands Octave Law?

• Properties of every 8th element are a repetition of the 1st element

• Properties of every 7th element are a repetition of the 1st element

• Properties of every 5th element are a repetition of the 1st element

• Properties of every 6th element are a repetition of the 1st element

Which elements form a Dobereiner's triad in Newlands' table?

• Lithium, Sodium, Potassium

• Carbon, Nitrogen, Oxygen

• Boron, Carbon, Nitrogen

• Hydrogen, Helium, Lithium

In which year was Newlands Octave Law discovered?

• 1866

• 1871

• 1882

• 1859

How many elements were known when Newlands proposed his law?

• 60

• 56

• 50

• 70

Up to which element was Newlands Octave Law applicable?

• Magnesium

• Calcium

• Sulfur

• Iron

Which two elements were incorrectly placed in the same slot according to Newlands' table?

• Iron and Sulfur

• Cobalt and Nickel

• Hydrogen and Fluorine

• Lithium and Sodium

Why is Newlands' law referred to as the Octave Law?

• Because it repeats every 6 elements

• Because it repeats every 5 elements

• Because it repeats every 8 elements

• Because it repeats every 7 elements