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Which element forms a compound with chlorine with the general formula MCl?
(1) Rb (3) Re
(2) Ra (4) Rn

Sagot :

Rb forms a c ok compound with the general formula MCI.
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Answer is (1) - Rb.


To form MCl, The cation should have +1 as the charge. According to the given choices, Rb can form +1 ion by losing an electron. It is because Rb is in 1st group of the periodic table.


The electron configuration of Rb is [Kr] 5s¹. After losing as electron, Rb has electron configuration as [Kr].


The compound is RbCl (Rubidium Chloride) which has a molar mass of 120.921 g/mol.


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