Which of the following elements markedly differ from other member of their respective groups?
Which of the following elements markedly differ from other member of their respective groups?
مندرجہ ذیل عناصر میں سے کون سے ان کے متعلقہ گروپوں کے دوسرے ممبروں سے واضح طور پر مختلف ہیں؟
Explanation
Lithium and beryllium markedly differ from other members of their respective groups.