- ELEMENT
- Fundamental constituent of a whole
- It's uncomfortable when you're out of yours
- Natural habitat
- Essential feature
- Natural setting
- Trace ___
- No, e.g.
- Periodic-table item
- Periodic table entry
- Component
- Nickel or neon
- Home environment
- Milieu
- Range part
- Helium or hydrogen
- Mercury, for one
- Chlorine, argon, or potassium
- Krypton, for one
- Part
- Periodic table listing
- Constituent
- Gold or silver
- Nitrogen or oxygen
- Gold, e.g.
- Natural environment
- 21-Down, e.g.
- H or O, in H2O
- Krypton, but not Tatooine
- Iron, e.g.
- Comfortable space
- Titanium, for one
- Neon or nobelium
- Carbon or neon
- I, O or U
- Gold or germanium
- Hydrogen or helium
- Comfort zone
- Favorable environment
- Oxygen or aluminum
- Palladium, e.g.
- Stomping grounds
- Periodic-table component
- See 39 Across
- Neon or nickel
- Feature
- Sodium or sulfur
- Moscovium, at #115
- Silver or sulfur
- Chlorine or krypton
- Constituent part
- Lanthanide series member
- Component part.
- Active part of electric iron.
- Basic substance.
- One of the electrodes in a vacuum tube.
- Sphere.
- Uranium is one.
- One's natural sphere.
- Part of a mechanism.
- Environment adapted to any person or thing.
- Plutonium, for instance.
- Fitting environment.
- Krypton, for example.
- Basic part.
- Molybdenum, for instance.
- Uranium, for instance.
- Rhenium or Rhodium.
- Silicon, for example.
- Factor.
- Gold.
- Hydrogen or oxygen.
- Simple substance.
- Oxygen, for one.
- Strontium, for example.
- Helium, for one.
- Ingredient.
- Gold, for one.
- Cerium, for one.
- Arsenic, for one.
- Fundamental substance.
- Lead, for one.
- Erbium or terbium
- In one's ___
- Carbon or boron
- Rudimentary principle
- Yttrium, for one
- Iron or tin, e.g.
- Substance
- Krypton is one
- Tin is one
- Yttrium, e.g.
- Neon or silver
- Osmium or uranium
- One's natural habitat
- Neon is one
- Argon or neon
- Einsteinium, e.g.
- Lead or zinc
- Lead, e.g.
- Antimony is one
- Iron or gold
- Proper sphere
- Fire or water
- Tin or lead
- Indium or osmium
- Neon, e.g.
- Plutonium, for one
- He or I may represent one
- It may be found in a table
- Earth, wind or fire
- Nickel, e.g.
- Part of a table?
- Sodium or chlorine
- Nickel, but not dime
- It's found in a table
- Copper or nickel
- Normal habitat
- Honda model
- Electric device with terminals
- Mercury, e.g.
- One of over 100 on a table
- Something found on a chemist's table
- The answer to each clue that says "This, on the periodic table"
- He or I, but not you?
- One of more than 115 on a table
- U, V, W or Y, but not X
- Erbium, terbium or ytterbium
- Bismuth, for example
- Fire or water, e.g.
- Neon or nobelium, e.g.
- Sodium or chlorine, e.g.
- Earth, wind or fire, to an early scientist
- It may be found on a table in science class
- Carbon is one
- Xenon or zirconium
- Tin or hydrogen
- Krypton e.g.
- Earth, wind or fire, e.g.
- Earth, air, fire or water
- Any of the rare-earth metals
- Argon or arsenic
- Carbon, neon or chlorine
- Re represents one
- Item on a certain table
- Platinum or plutonium
- Silver or silicon
- He, e.g.
- Essential part
- With 62-Across, a key component of any good prank, and a hint to the beginnings of the prankster's tools herein
