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CBSE Class 10 Answered

Plz give and of Qsno 7 of periodic classification of elements from the inportimp question provided
Asked by anshu94dav | 08 Mar, 2019, 10:55: PM
answered-by-expert Expert Answer
Question:
 
Atoms of eight elementsA, B,C, D, E, F, G and Hhave the same number of electronsin their outermost shell. Elements A and G combine to form an ionic compound. This ionic compound is added toa small amount of almost all vegetables and dishes during cooking. Oxides of elements A and B are basic in nature,while those of elements E and F are acidic. However, the oxide of elementD is almost neutral. Based on the above information, answer the following questions:
 (i)To which group or period of the periodic table do these elements belong?
 (ii)What would be the nature of the compound formed by a combination of elements B and F?
 (iii)Which two of these elements could definitely be metals?
(iv)Which one of the eight elements is mostlikely to be found in the gaseous state at room temperature?
 (v)If the number of electrons in the outermost shell of elements C and G are 3 and 7,respectively, write the formula of the compound formed by the combination of C and G
 
Asnwer:
(i) These elements belongs to third period.
 
(ii) The compound formed by B and F is ionic in anture.
 
(iii) A and B are metals as they formed basic oxides.
 
(iv)Element H is mostlikely to be found in the gaseous state at room temperature.
 
(v) The formula of the compound formed by the combination of C and G is CG3.
Answered by Varsha | 09 Mar, 2019, 05:03: PM

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