A) Gallium and germanium
B) Aluminum and silicon
C) Iron and sulphur
D) Proton and silicon
Correct Answer: A
Solution :
[a] Gallium and germanium Eka-term introduced by Mendeleev for element that were predicted but unknown. All eka-elements were discovered later. Eka-aluminium was called gallium (1875) and eka silicon was germanium (1886)You need to login to perform this action.
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