Question

which elements pair is against to mendeleev periodic laws ?

Answer 1

Answer:

Explanation look a below attachment you will get answer

Answer 2

Answer:

Potassium and argon, iodine and tellurium, cobalt and nickel.

Explanation:

• The elements are organised in Mendeleev's periodic table in increasing order of their atomic weights.
• However, very few elements are organised in reverse.
• They're referred to as anomalous pairs.
• They're referred to as anomalous pairs. They are potassium and argon, iodine and tellurium, cobalt and nickel.
• The element that Mendeleev's periodic table could not place in a specific location is hydrogen.
• In Mendeleev's periodic table, some anomalous couples include Ar-K, Co-Ni, and Te.
• Mendeleev arranged the elements not in ascending order of atomic mass but rather according to similarities in their properties.
• Prior to K (at mass = 39.1) is Ar (at mass = 39.9).
• Prior to K (at mass = 39.1) is Ar (at mass = 39.9).Ni (at mass = 58.6) is put in front of Co (at mass = 58.9).
• Prior to K (at mass = 39.1) is Ar (at mass = 39.9).Ni (at mass = 58.6) is put in front of Co (at mass = 58.9).Te, with mass 127.6, comes before I, with mass 126.9.
• In Mendeleev's periodic chart, the elements Al and Si are not an outlier pair.
• The placement of Al (at mass = 26.98) before Si (at mass = 28.4) indicates that the atomic masses of Al and Si are increasing. Consequently, they are not an abnormal couple.

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