Read the list of elements given below. he, ne, ar, kr which of the following about the elements is true? all of them are unreactive gases. all of them are reactive metalloids. he and ne are unreactive gases and ar and kr reactive metalloids. he and ne are reactive metalloids and ar and kr unreactive gases.
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Read the list of elements given below. he, ne, ar, kr which of the following about the elements is t...
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