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6 January, 21:03

Which of the following elements is a noble gas?

a. rb

b. mn

c. cl

d. kr

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Answers (1)
  1. 7 January, 00:26
    0
    D) Kr

    On the periodic table it is found in Group 0/8 which is known as the noble gases as they have 8 electrons in their outer shell.
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