Eka-aluminium and Eka-silicon are known as:
Correct answer: A. Gallium and Germanium
- A. Gallium and Germanium
- B. Aluminium and Silicon
- C. Iron and Sulphur
- D. Proton and Silicon
Explanation
Dmitri Mendeleev predicted the existence and properties of several undiscovered elements. He used the prefix "Eka-" (Sanskrit for "one") to name the elements directly below known ones in his periodic table. Eka-aluminium was his name for the element below aluminum (Gallium), and Eka -silicon was for the element below silicon (Germanium).
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About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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