7 down. a member of the boron family and most abundant metal on earth? 8 LETTERS
16 down. i am a member of the nitrogen family with 16 neutrons. 10 LETTERS
HELPPPP! i will fail.
7 down is aluminum! #16 down is phosphorus (atomic mass= 31; and 31- the # of neutrons= the atomic mass, which is 15 for phosphorus!)
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