Methanium is a particularly exotic one; ammonium is another.
Cation
In an 1869 report, this Russian scientist created a well-known precursor to our modern periodic table after visualizing it in a dream.
[Dmitrii] Mendeleev
This field of physics is commonly considered a precursor to modern physical chemistry.
Quantum Physics [Particle Physics will also be accepted]
Often described as "required viewing for chemistry majors", this TV show explores one man's unorthodox journey to pay for chemotherapy.
Breaking Bad
Are you made of this metal and metalloid pair, because you're CuTe.
Copper and Tellurium
These species work to lower the activation energy for a reaction, and are not consumed in the process.
Catalyst
This scientist's law of partial pressures was first described in an 1802 paper entitled "On the expansion of elastic fluids by heat."
[John] Dalton
This emerging field applies quantum physics and quantum chemistry to topics of biological interest.
Quantum Biology [Biophysical Chemistry will be begrudgingly accepted]
The documentary series Unnatural Selection describes genetic engineering, including this recent Nobel-prize-winning technology.
CRISPR [/Cas9]
This substance may cause "diaphoresis, micturition, and acute tissue hydration" [Portal]
Water
In electrochemistry, the terminal where reduction occurs.
Cathode
In an 1860 lecture, this scientist describes the careful separation of tartaric acid salt enantiomers.
[Louis] Pasteur
Mark Watney, a fictional scientist in this field, extracts hydrogen from hydrazine in a particularly dangerous reaction in the book The Martian.
Botany
Famed author of Twilight Stephenie Meyer describes the plight of Alex, a doctor with a special interest in poisons, in this 2016 novel.
The Chemist
Aurum, more commonly known as this substance, has its characteristic color due to relativistic effects
Gold
This series on MasterOrganicChemistry.com teaches stereochemical concepts with the help of some feline friends.
On Cats
This spectral emission line series, which includes lines at 656.3 nm and 486.1 nm, among others, was described using the now-similarly-named formula in an 1885 paper by J.J.B.
Balmer series
You might be interested in this field if you enjoy hot, viscous, silicate-based fluids.
Volcanology [Vulcanology]
Payday 2
This letter is the only one not found in the periodic table.
"J"
Dopamine, norepinephrine, and adrenaline are members of this family of hormones.
Catecholamines
Best known for a namesake equation that relates temperature and reaction rate constants, in 1887, this scientist published a seminal paper on electrolyte solutions.
[Svante] Arrhenius
Physical chemists and scientists in this field might study distant emission line spectra.
Astronomy
Searching benzene in this search engine will provide a terribly cursed structure.
Bing
Taking all of the carbon out of the human body would provide enough graphite for this many #2 pencils.
9000 [or >9000]