Chemistry
Articles about matter, substances, reactions and chemical science.
Nitrate
Nitric acid
Nitric acid (HNO3): properties, production, uses and safety
Nitric oxide
Nitric oxide (NO): properties, roles, and applications
Nitride
Nitride (compounds of nitrogen with less electronegative elements)
Nitrile
Nitrile (organic functional group and related compounds)
Nitrite
Nitrite (NO2−): properties, occurrence, uses and safety
Nitro compound
Nitrocellulose
Nitrocellulose (cellulose nitrate, guncotton)
Nitrogen
Nitrogen (chemical element)
Nitrogen is a colorless, odorless diatomic nonmetal (symbol N, atomic number 7) that makes up about 78% of Earth's atmosphere and is essential for life, agriculture and many indust
Nitrogen dioxide
Nitrogen dioxide (NO2) — properties, sources, and impacts
Nitrogen fixation
Nitrogen oxide
Nitrogen trichloride
Nitrogen triiodide
Nitroglycerin
Nitroglycerin (glyceryl trinitrate): properties, history, uses, and safety
Nitrous acid
Nitrous acid (HNO2) — properties, preparation, reactions, and uses
Nitrous oxide
NMR spectroscopy
NMR spectroscopy: principles, instruments, and applications
Nobelium
Nobelium (element No, atomic number 102)
Noble gas
Noble gas compound
Noble metal
Nonmetal
Nonmetal (chemical element)
Novichok
Novichok — Soviet-era family of nerve agents
Nuclear chemistry
Nuclear reaction
Nucleophile
Nucleophile (chemistry): definition, properties and reactivity
Nucleophilic substitution
O2
O2 — diatomic oxygen, telecom brand, arenas, and other meanings
Ochre
Ochre (Ocher): natural earth pigment and its uses
Octane
Octane rating
Octene
Octet rule
Odor
Oganesson
Oganesson (Og): the synthetic element with atomic number 118
Oleum
Organic chemistry
Organic compound
Organic matter
Organic reaction
Organic reactions: types, mechanisms, and applications
Organic synthesis
Organolithium reagent
Organometallic chemistry
Osmium
Osmium (Os) — the densest naturally occurring element and a rare platinum-group metal
Ostwald process
Ostwald process — industrial production of nitric acid
Oxidation state
Oxidation state (oxidation number)