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Section A (about 30 minutes): Compulsory short answer questions on the SL/HL core and (for HL) the HL extension. Some questions are common to HL and SL. The maximum raw mark for this section is 25. Section B (60 minutes for SL, 100 minutes for HL): 3 (SL) or 5 (HL) compulsory structured questions on the SL/HL core and the HL extension.
The High Luminosity Large Hadron Collider (HL-LHC; formerly referred to as HiLumi LHC, Super LHC, and SLHC) is an upgrade to the Large Hadron Collider, operated by the European Organization for Nuclear Research (CERN), located at the French-Swiss border near Geneva. From 2011 to 2020, the project was led by Lucio Rossi. In 2020, the lead role ...
The course World Religions is offered at SL and the interdisciplinary course Environmental Systems and Societies is offered at SL or HL. Group 4: Experimental sciences. Five courses are offered at both SL and HL: chemistry, biology, physics, design technology and computer science. The course Sport, Exercise and Health Science is offered at both ...
Liquid crystal (LC) is a state of matter whose properties are between those of conventional liquids and those of solid crystals. For example, a liquid crystal can flow like a liquid, but its molecules may be oriented in a common direction as in a solid.
Liquid chromatography–mass spectrometry (LC–MS) is an analytical chemistry technique that combines the physical separation capabilities of liquid chromatography (or HPLC) with the mass analysis capabilities of mass spectrometry (MS). Coupled chromatography – MS systems are popular in chemical analysis because the individual capabilities ...
The optical spectrum of this d 6 octahedral complex exhibits an intense absorption near 250 nm corresponding to a transition from ligand σ MO to the empty e g MO. In IrBr 6 2−, which is a d 5 complex, two absorptions, one near 600 nm and another near 270 nm, are observed.
(May 2022) (Learn how and when to remove this message) The simplest liquid crystalline phase that is formed by spherical micelles is the ' micellar cubic ', denoted by the symbol I 1 . This is a highly viscous, optically isotropic phase in which the micelles are arranged on a cubic lattice.
Reversed-phase liquid chromatography (RP-LC) is a mode of liquid chromatography in which non-polar stationary phase and polar mobile phases are used for the separation of organic compounds. [ 1 ] [ 2 ] [ 3 ] The vast majority of separations and analyses using high-performance liquid chromatography (HPLC) in recent years are done using the ...