Fill in the Blanks (Solution)

by Charles Steinhardt, Glenn Willen, and Dan Gulotta

The wordlist at the bottom clues chemical elements (with American English spelling). Each of the crisscrosses can be filled in with a set of elements that has something common. In each case, there is one element missing from the set.

CV
GOHASSIUM
ZIRCONIUMCOPPERN
HALEA
MOLYBDENUMDARMSTADTIUM
DGNI
IPALLADIUMIU
UNCM
MERUTHENIUM
YISU
TRUTHERFORDIUM
TOSUS
ROENTGENIUMBNZINC
IUINIOBIUMLA
UNUICVD
MGCHROMIUMKEM
SMSEABORGIUM
RTTLOU
TECHNETIUMAHPM
ENENRL
NRTTITANIUM
IRIDIUMCAUT
UULHMI
MEITNERIUMAN
YMFU
SCANDIUM
I
U
M

Transition metals, except COBALT


CARBON
OY
PHOSPHORUST
OOT
TUNGSTENR
AHI
SULFURYU
SLVANADIUM
IURR
UOOA
MROXYGEN
IEI
NITROGENU
EM

Single-letter chemical symbols, except IODINE


POTASSIUM
UI
CNLEAD
OGVN
PSETIN
PTRI
EEM
IRONGOLD
N
MERCURY

Chemical symbols taken from non-English terms, except SODIUM


M
ARSENIC
NA
CGNITROGEN
HAOB
SCIRONHYDROGEN
POTASSIUMOEINB
DLOMSNO
ZINCCHLORINEER
UIYUO
MUVBMSILICON
MADEO
NESCOBALTP
MAGNESIUMXEP
DULYNICKEL
IMFGIR
UFLUORINEU
MRNM

Dietary elements (those believed essential for mammals), except PHOSPHORUS


FLUORINE
XE
KRYPTON
GN
E
CHLORINE
EA
LDX
NITROGEN
UNN
MO
ARGON

Gases at STP, except HYDROGEN


C
OCERIUM
BE
CARBONOSMIUM
LAI
TRNU
INDIUM
CUC
SODIUMKO
POECX
PDSULFURY
HELIUMRG
RNSILVER
ERBIUMUN
M

Elements with 6-letter names, except RADIUM


HLITHIUM
THORIUMVOXYGENH
SACALIU
SILICONLANTHANUMCOBALT
ATLAIKI
MANGANESEODUTERBIUM
DLERBIUMLM
IUIU
UMOLYBDENUM
CERIUME

Elements discovered by Swedes, except SELENIUM


The chemical symbols of the missing elements spell CoINaPHRaSe. The answer is COIN A PHRASE.