In the two elements, _ Z₁ A^ M₁ and _ z₂ B^ M₂ , the following relations are true. M₁ M₂ and Z₁ Z₂ but M₁-Z₁=M₂-Z₂ . These elements are ( M is atomic weight, Z is atomic number)

Step-by-step solution

Given, z₁ A^ M₁ and z₂ B^ M₂ Here, M₁ M₂ and Z₁ Z₂ [ M= atomic weight, Z= atomic number ] But, M₁-Z₁=M₂-Z₂ We know, atomic weight = number of protons + number of neutrons and atomic number = number of protons So, number of neutrons = atomic weight - atomic weight Any of two or more species of atoms or nuclei that have same number of neutrons are known as isotone. So, both elements are isotonic.