An element X combines with oxygen to form an oxide XO. This oxide is electrically conducting.
(a) How many electrons would be there in the outermost shell of the element X ?
(b) To which group of the periodic table does the element X belong ?
(c) Write the formula of the compound formed when X reacts with chlorine.
Lakhmir Singh Chemistry Class 10
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The element X belongs to 2nd group of periodic table. since the oxide is conducting the electricity then it must be ionic. The element may be Be or Mg.
1) It must contain 2 electrons in its outermost shell. so by giving 2 electrons to the oxygen it forms oxide. and formula will be XO. Example: BeO or MgO
2) this element when combine with chlorine form the chloride with formula XCl2. As element has 2 electrons in its outer most shell it can combine with 2 chlorine to complete the octate of chlorine. Hence formula will be XCl2 example: BeCl2 or MgCl2
1) It must contain 2 electrons in its outermost shell. so by giving 2 electrons to the oxygen it forms oxide. and formula will be XO. Example: BeO or MgO
2) this element when combine with chlorine form the chloride with formula XCl2. As element has 2 electrons in its outer most shell it can combine with 2 chlorine to complete the octate of chlorine. Hence formula will be XCl2 example: BeCl2 or MgCl2
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Answer:
1.There would be 2 electrons in its outermost shell.
2The element X belongs to 2nd group of periodic table.
3.The formula will be XCl2 example: BeCl2 or MgCl
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