When elements are arranged in the order of increasing atomic masses, the properties of the first element is similar to those of the eighth element like with musical notes' — this law is known as:
Newlands law of octaves
Early attempts to classify the elements looked for periodicity in their properties when arranged in some systematic order of atomic mass.
In 1865 the British chemist John Alexander Reina Newlands, arranging the then-known elements in order of increasing atomic mass, observed that the properties of every eighth element resembled those of the first. Drawing an analogy with the seven notes of a musical scale that repeat at the octave, he called this the Law of Octaves.
Dobereiner’s Law of Triads (1817) grouped elements in threes where the middle atomic mass was the arithmetic mean of the other two; Mendeleev’s periodic law (1869) arranged elements by atomic mass in a full periodic table; Moseley’s modern periodic law (1913) arranged elements by atomic number.
Hence, Newlands law of octaves.
Similar Questions
Which statement best identifies a metalloid based on its properties?
The element with atomic number 57 belongs to:
Among H, Li, O and F, ____ element has the largest atom and ____ the smallest atom.
On moving from sodium to chlorine across a period, the atomic size ________.
Which of the following elements has the highest ionisation energy?
Eka-aluminium was later named as the metal __________ in the modern periodic table.
Which of the following elements is more electronegative?
_______ are electropositive in nature.
In the modern periodic table, _______ is the last metalloid.
Which of the following is not the electronic configuration of a non-metal?
Important Questions from Classification of Elements and Periodicity in Properties
- Which one of the following statements about alkaline earth metals is NOT true ?
- What element is a greenish yellow gas with a characteristic smell at room temperature?
- In the periodic table, as one goes down the group, which property doesn't change?
- Which of the following is a copper ore?
- Which scientist invented the Periodic table?
