Question

What is telluric screw? Explain in details.

Answer 1

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Answer:

Alexander-Emile, a French geologist, was the first person to notice the periodicity of the elements, similar elements occurring at regular intervals when they are ordered by their atomic weights. In 1862 he gave an early form of periodic table, which he named the 'telluric helix', after the element Tellurium, which fell near the center of the diagram. With the elements arranged in a spiral on a cylinder by order of increasing atomic weight, Chancourtois saw that elements with similar properties lined up vertically.

Chancourtois plotted the atomic weights on the surface of a cylinder with a circumference of 16 units, the approximate atomic weight of oxygen. The resulting helical curve, which Chancourtois called a square circle triangle, brought similar elements onto corresponding points above or below one another on the cylinder. He was the first scientist to see the periodicity of elements when they were arranged in order of their atomic weights. He found out that the similar elements occurred at regular atomic weight intervals.

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Answer 2

Answer:

1. A tellurichelix is an arrangement of elements by Da Chancoutortois. In this he arranged the known elements in cylindrical table according to their atomic weights. In this way he showed the periodicity in elements