Question

in periodic table,inversion of atomic weight took place in which pairs
1 - ARGON,POTASSIUM
2 - BORON,SCANDIUM
3 - HYDROGEN, HELIUM
4 - BERYLLIUM,BORON

Answer 1

Explanation:

Inversion of atomic weight took place in argon and potassium pairs

Answer 2

ARGON,POTASSIUM pairs in the periodic table where the inversion of atomic weight.

Explanation:

• The Molecular mass of an element can be calculated by adding the atomic masses of each of its constituents.
• "The atomic mass of an element is the as the total mass of one atom of the given element".
• Its unit is called the atomic mass unit and which is denoted by the symbol ‘u’.
• Mendeleev's periodic table is based on the increasing order of atomic weights of the elements.
• It follows the periodic law which states that the physical and chemical properties of elements are a periodic function of their atomic weights.
• The inverted pairs are (Ar,K), (Co,Ni) and (Te, I). They are also called anomalous pairs.