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Biology, 15.10.2019 04:30 germainenez3288
8. what atom is a noble gas in group 18, row 4?
a. ar
b. kr
c. ne
d. rn
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8. what atom is a noble gas in group 18, row 4?
a. ar
b. kr
c. ne
d....
a. ar
b. kr
c. ne
d....
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