Who introduced the zero group:
Correct answer: B. Mendeleev
- A. Lother Mayer
- B. Mendeleev
- C. Ramsay
- D. Mosley
Explanation
Group VIIIA elements, which are also called zero group elements, usually show zero oxidation state because there is no vacancy in their outermost shells.Mendeleev created the 'zero group' only to fit the noble gases which were discovered towards the end of 19th century.
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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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