Přírodní Vědy SAT - Chemistry

a large molecule composed of repeating structural units, or monomers, covalently bonded together in a chain-like structure

polymer

each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, leading to variation in atomic mass

izotop

having a tendency to to undergo chemical reactions

reaktivní, reaktivní

containing or relating to a dangerous form of energy produced by nuclear reactions

radioaktivní, radioaktivní

a chemical bond where atoms share electrons to form a stable molecule

kovalentní vazba, kovalentní spojení

a type of chemical bond between two atoms involving the sharing of two pairs of electrons, resulting in a stronger and more stable connection than a single bond

dvojná vazba, dvojité spojení

defining substances or surfaces that have a strong attraction to water molecules, allowing them to easily absorb or interact with water

hydrofilní

characterized by substances or surfaces that repel water molecules, showing little or no affinity for water

hydrofobní, odpuzující vodu

a chemical reaction that releases heat energy to its surroundings, typically resulting in a temperature increase

exotermická reakce, reakce uvolňující teplo

a chemical process that absorbs heat energy from its surroundings, often resulting in a temperature decrease

endotermická reakce, reakce absorbující teplo

the weighted average mass of an atom of an element, taking into account the masses of all its naturally occurring isotopes

atomová hmotnost, průměrná atomová hmotnost

the total mass of all the atoms in a single molecule of a substance

molekulární hmotnost, hmotnost molekuly

the total number of protons and neutrons in the nucleus of an atom

hmotnostní číslo, atomové číslo

a fundamental unit in chemistry that represents the amount of substance containing as many entities (atoms, molecules) as there are in 12 grams of carbon-12

mol

a container usually made of glass or plastic used in chemistry and laboratory

kuzel, nádoba

a laboratory tool used to measure and transfer small volumes of liquid

pipeta

a device that spins samples to separate components based on density

centrifuga, centrifugální stroj

a special paper treated with chemicals that change color in response to certain conditions, used to test for the presence of specific substances or measure pH levels

indikátorový papír, testovací papír

a tabular arrangement of chemical elements organized based on their atomic number, electron configuration, and recurring chemical properties

periodická tabulka, tabulka prvků

the process where calcium or calcium salts accumulate in a tissue, making it hard and rigid

kalcifikace, kalcifikace

a laboratory method used to determine the concentration of a substance in a solution by gradually adding a reagent of known concentration until a reaction is completed

titrace, dávkování

the process by which microorganisms convert carbohydrates into alcohol, acids, or gases

fermentace

the measure of how much of a substance is present in a certain volume of solution

koncentrace, obsah

a device used to analyze the chemical composition of small samples at a microscopic scale

mikrosonda

a type of metallic material composed of three or more elements mixed together in varying proportions

multikomponentní slitina, slitina s více komponenty

a group of atoms bonded together that behaves as a single unit within a molecule

radikál, chemický radikál

a test that measures the presence, amount, or activity of a specific substance in a sample, often used in scientific and medical research

analýza, zkouška

a state in a chemical reaction where the forward and reverse reactions occur at the same rate, resulting in no net change in the concentrations of reactants and products

dynamická rovnováha, chemická rovnováha

(chemistry) the process of separating a liquid or solution into its parts by passing electricity through it

elektrolýza

(of a solid) to become one with a liquid

rozpouštět, rozpouštět se

to make a solution or mixture weaker or less concentrated by adding more liquid

naředit, ředěním

to disperse fine particles throughout a fluid so they remain evenly distributed without settling

suspendovat, dispergovat

the process of dispersing or dissolving a substance into a solvent to form a homogeneous solution

solubilizace, rozpouštění

the arrangement, composition, and characteristics of a material at a microscopic level

mikrostruktura, mikrostruktura materiálu

a tiny, tube-shaped structure made of carbon atoms, with remarkable strength and electrical properties

nanotrubka

heated to a liquid state due to high temperatures

tavený, rozpuštěný

a phase is a distinct form of matter with uniform chemical and physical properties, separated from other forms by boundaries

fáze, stav

to eliminate or neutralize harmful substances

detoxikovat, neutralizovat škodlivé látky

denoting substances with a highly organized molecular structure, akin to crystals

krystalický, krystalizovaný

a scientist who studies the structure and properties of crystals

krystalograf

a scientist who studies the chemical composition and processes of celestial bodies to understand the formation and evolution of the universe

kosmochemik

a laboratory technique used to separate and analyze mixtures of substances based on their differential affinities for a stationary phase and a mobile phase

chromatografie

a type of radioactive decay where a nucleus emits a beta particle (electron or positron) to transform a neutron into a proton or vice versa

beta rozpad, beta radioaktivní rozpad

not having an electrical charge

neutrální, nevybitý

a device that turns vapor into liquid by cooling it

kondenzátor, zařízení pro kondenzaci

weak attractive forces between molecules or atoms, arising from temporary or induced dipoles

Van der Waalsovy síly, interakce Van der Waalsovy

a scientist or engineer who specializes in the study and production of metals and alloys, including their properties, processing methods, and applications

metalurg

the process by which molecules of a substance adhere to the surface of a solid or liquid, forming a thin film or layer

adsorpce, povrchová adsorpce

a renewable, alternative fuel made from organic materials such as vegetable oils, animal fats, or recycled cooking grease

biodiesel, biopalivo

a specific composition of a mixture of substances, typically metals or alloys, where the melting point is at its lowest possible temperature under atmospheric pressure

eutektoid

a substance capable of absorbing and retaining a large amount of liquid relative to its own mass

superabsorbent, polymér superabsorbent