Actinide chemistry (or actinoid chemistry) is one of the main branches of nuclear chemistry that investigates the processes and molecular systems of the actinides.
 The actinides chemistry derives its name from the group 3 element actinium.
 The informal chemical symbol An is used in general discussions of actinide chemistry to refer to any actinide.
 All but one of the actinides are f-block elements, corresponding to the filling of the 5f electron shell; lawrencium, a d-block element, is also generally considered an actinide.
 In comparison with the lanthanides, also mostly f-block elements, the actinides show much more variable valence.
 The actinide series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium through lawrencium.
Ernest Orlando Lawrence (August 8, 1901 – August 27, 1958) was a pioneering American nuclear scientist and winner of the Nobel Prize in Physics in 1939 for his invention of the cyclotron.
 He is known for his work on uranium-isotope separation for the Manhattan Project, as well as for founding the Lawrence Berkeley National Laboratory and the Lawrence Livermore National Laboratory.
The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of an atom.
 It is identical to the charge number of the nucleus.
 The atomic number uniquely identifies a chemical element.
 In an uncharged atom, the atomic number is also equal to the number of electrons.
Meitnerium is a chemical element with symbol Mt and atomic number 109.
 It is an extremely radioactive synthetic element (an element not found in nature that can be created in a laboratory).
 The most stable known isotope, meitnerium-278, has a half-life of 7.6 seconds, although the unconfirmed meitnerium-282 may have a longer half-life of 67 seconds.
 The GSI Helmholtz Centre for Heavy Ion Research near Darmstadt, Germany, first created this element in 1982.
 It is named for Lise Meitner.
In relation to the chemical elements, a symbol is a code for a chemical element.
 Many functional groups has their own chemical symbol, e.g. Ph for the phenyl group, and Me for the methyl group.
 Chemical symbols for elements normally consist of one or two letters from the Latin alphabet, but can contain three when the element has a systematic temporary name (as of March 2017, no discovered elements have such a name), and are written with the first letter capitalized.
Vasili Evgrafovich Samarsky–Bykhovets (Russian: Васи́лий Евгра́фович Сама́рский-Быховец ; November 7, 1803 – May 31, 1870) was a Russian mining engineer and the chief of Russian Mining Engineering Corps between 1845 and 1861.
 The mineral samarskite (samarskite-Y, samarskite-Yb and calciosamarskite), and chemical element samarium are named after him.
 He was the first person whose name was given to a chemical element.
Californium is a radioactive chemical element with symbol Cf and atomic number 98.
 The element was first synthesized in 1950 at the Lawrence Berkeley National Laboratory (then the University of California Radiation Laboratory), by bombarding curium with alpha particles (helium-4 ions).
 It is an actinide element, the sixth transuranium element to be synthesized, and has the second-highest atomic mass of all the elements that have been produced in amounts large enough to see with the unaided eye (after einsteinium).
 The element was named after the university and the state of California.
Molecular oxohalides (oxyhalides) are a group of chemical compounds in which both oxygen and halogen atoms are attached to another chemical element A in a single molecule.
 They have the general formula AOX, X = F, Cl, Br, I.
 The element A may be a main group element, a transition element or an actinide.
 The term oxohalide, or oxyhalide, may also refer to minerals and other crystalline substances with the same overall chemical formula, but having an ionic structure.
Actinium is a chemical element with symbol Ac and atomic number 89.
 Actinium gave the name to the actinide series, a group of 15 similar elements between actinium and lawrencium in the periodic table.
 It is also sometimes considered the first of the 7th-period transition metals, although lawrencium is less commonly given that position.
 Discovered in 1899, it was the first non-primordial radioactive element to be isolated.
 Polonium, radium and radon were observed before actinium, but they were not isolated until 1902.
Lawrencium is a synthetic chemical element with symbol Lr (formerly Lw) and atomic number 103.
 It is named in honor of Ernest Lawrence, inventor of the cyclotron, a device that was used to discover many artificial radioactive elements.
 A radioactive metal, lawrencium is the eleventh transuranic element and is also the final member of the actinide series.
 Like all elements with atomic number over 100, lawrencium can only be produced in particle accelerators by bombarding lighter elements with charged particles.
 Twelve isotopes of lawrencium are currently known; the most stable is Lr with a half-life of 11 hours, but the shorter-lived Lr (half-life 2.7 minutes) is most commonly used in chemistry because it can be produced on a larger scale.

Question: the chemical element Lawrencium is named after a scientist born in which year ?
Answer: 1901