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23 April, 07:31

Which element forms a compound with chlorine with the general formula MCl?

(1) Rb (3) Re

(2) Ra (4) Rn

+2
Answers (2)
  1. 23 April, 10:58
    0
    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.
  2. 23 April, 11:03
    0
    Rb forms a c ok compound with the general formula MCI.
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