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OpenStudy (anonymous):

Two highly reactive elements in Period 2 are the metal lithium and the (1 point)metalloid arsenic. nonmetal selenium. nonmetal fluorine. nonmetal krypton.

OpenStudy (unklerhaukus):

krypton is not highly reactive

OpenStudy (unklerhaukus):

and check a periodic table to see which of the other choices are in the second period (row)

OpenStudy (jfraser):

only one of those choices is even in the second period along with lithium

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