Periodic Table Quiz: Elements 51-118, Go!

[A] Antimony (Sb) | A metalloid with a variety of uses in alloys and as a flame retardant.

[B] Tellurium (Te) | A rare element that is chemically related to selenium and sulfur.

[D] Iodine (I) | A halogen essential for the production of thyroid hormones.

[C] Xenon (Xe) | A noble gas used in lighting and as a tracer in chemical analysis.

[D] Cesium (Cs) | An alkali metal that is highly reactive and used in atomic clocks.

[A] Barium (Ba) | A heavy metal used in X-ray shielding and as a chemical reagent.

[C] Lanthanum (La) | The first of the lanthanides, used in electronics and as a catalyst.

[A] Cerium (Ce) | A rare earth element used in catalysts and as a component in glass.

[C] Praseodymium (Pr) | A rare earth metal used in metal alloys and as a neutron absorber.

[B] Neodymium (Nd) | A rare earth element used in strong magnets and lasers.

[C] Promethium (Pm) | A radioactive rare earth element used in nuclear batteries.

[A] Samarium (Sm) | A rare earth metal used in electronics and as a neutron absorber.

[B] Europium (Eu) | A rare earth element used in phosphors and as a red pigment in glass.

[C] Gadolinium (Gd) | A rare earth metal used in MRI contrast agents and as a neutron absorber.

[D] Terbium (Tb) | A rare earth element used in green pigments and as a magnetic material.

[D] Dysprosium (Dy) | A rare earth metal used in electronics and as a hardening agent.

[A] Holmium (Ho) | A rare earth metal used in lasers and as a catalyst.

[B] Erbium (Er) | A rare earth metal used in fiber optics and as a nuclear control rod material.

[C] Thulium (Tm) | A rare earth metal used in portable X-ray devices and as a catalyst.

[A] Ytterbium (Yb) | A rare earth metal used in superconductors and as a source of ytterbium-169 for cancer treatment.

[D] Lutetium (Lu) | A rare earth metal used in certain types of electronics and medical imaging.

[B] Hafnium (Hf) | A lustrous, silvery metal with a high melting point, used in nuclear control rods.

[C] Tantalum (Ta) | A rare, hard, blue-gray, lustrous metal used in electronics and medical implants.

[D] Tungsten (W) | A hard, steel-colored metal with the highest melting point of all metals.

[B] Rhenium (Re) | A silvery-gray metal with the second-highest melting point and density after iridium.

[C] Osmium (Os) | A hard, brittle, and blue-gray metal in the platinum group, known for its high density.

[B] Iridium (Ir) | A very hard, brittle, silvery-white metal of the platinum group, used in catalysts and electronics.

[C] Platinum (Pt) | A dense, malleable, and ductile metal with many uses, including jewelry and catalytic converters.

[A] Gold (Au) | A precious metal known for its conductivity, luster, and resistance to corrosion.

[B] Mercury (Hg) | A liquid metal at room temperature, used in thermometers and barometers.

[C] Thallium (Tl) | A soft, malleable, and toxic metal that can be found in electronic devices.

[C] Lead (Pb) | A heavy metal commonly used in batteries, welding, and as a shield against radiation.

[B] Bismuth (Bi) | A pentavalent post-transition metal with applications in cosmetics and pharmaceuticals.

[C] Polonium (Po) | A rare and highly radioactive metal with no stable isotopes.

[A] Astatine (At) | A halogen with no stable isotopes, making it one of the least studied elements.

[B] Radon (Rn) | A radioactive noble gas that occurs naturally as a decay product of uranium and thorium.

[C] Francium (Fr) | The second-least electronegative element, with no stable isotopes and very short-lived isotopes.

[A] Radium (Ra) | A radioactive metal used historically in cancer treatments and as a source of radium-226.

[B] Actinium (Ac) | A soft, silvery radioactive metal with chemical properties similar to lanthanum.

[D] Thorium (Th) | A radioactive actinide with applications in nuclear power and as a source of thorium-232.

[D] Protactinium (Pa) | A radioactive element that is the first member of the actinide series.

[A] Uranium (U) | A heavy metal naturally occurring in low concentrations and is a key material for nuclear fuel.

[B] Neptunium (Np) | The first transuranium element to be artificially produced, named after the planet Neptune.

[C] Plutonium (Pu) | A radioactive element used as a fuel for nuclear reactors and in nuclear weapons.

[A] Americium (Am) | A radioactive element with the symbol Am and is used in smoke detectors.

[B] Curium (Cm) | A radioactive element with the symbol Cm, named in honor of Marie and Pierre Curie.

[C] Berkelium (Bk) | A transuranic radioactive element with the symbol Bk, first synthesized in 1949.

[C] Californium (Cf) | A radioactive element with the symbol Cf, discovered in 1950 at the University of California.

[B] Einsteinium (Es) | A radioactive element with the symbol Es, discovered in 1952 as a product of nuclear fission.

[A] Fermium (Fm) | A synthetic radioactive element with the symbol Fm, named in honor of Enrico Fermi.

[D] Mendelevium (Md) | A synthetic radioactive element with the symbol Md, named after Dmitri Mendeleev.

[A] Nobelium (No) | A radioactive element with the symbol No, named in honor of Alfred Nobel.

[B] Lawrencium (Lr) | A synthetic radioactive element with the symbol Lr, named in honor of Ernest O. Lawrence.

[C] Rutherfordium (Rf) | A synthetic radioactive element with the symbol Rf, named after Ernest Rutherford.

[A] Dubnium (Db) | A synthetic radioactive element with the symbol Db, named after the city of Dubna.

[B] Seaborgium (Sg) | A synthetic radioactive element with the symbol Sg, named in honor of Glenn T. Seaborg.

[C] Bohrium (Bh) | A synthetic radioactive element with the symbol Bh, named after Niels Bohr.

[D] Hassium (Hs) | A synthetic radioactive element with the symbol Hs, named after the town of Hesse.

[B] Meitnerium (Mt) | A synthetic radioactive element with the symbol Mt, named after Lise Meitner.

[C] Darmstadtium (Ds) | A synthetic radioactive element with the symbol Ds, named after the city of Darmstadt.

[A] Roentgenium (Rg) | A synthetic radioactive element with the symbol Rg, named after Wilhelm Conrad Röntgen.

[B] Copernicium (Cn) | A synthetic radioactive element with the symbol Cn, named in honor of Nicolaus Copernicus.

[C] Nihonium (Nh) | A synthetic radioactive element with the symbol Nh, named after Japan, where it was first synthesized.

[A] Flerovium (Fl) | A synthetic radioactive element with the symbol Fl, named after the Flerov Laboratory of Nuclear Reactions.

[B] Moscovium (Mc) | A synthetic radioactive element with the symbol Mc, named after the Moscow Oblast.

[C] Livermorium (Lv) | A synthetic radioactive element with the symbol Lv, named after the Lawrence Livermore National Laboratory.

[B] Tennessine (Ts) | A synthetic radioactive element with the symbol Ts, named after the region of Tennessee.

[D] Oganesson (Og) | A synthetic radioactive element with the symbol Og, named after Yuri Oganessian.