Chem Vocab: Absolute Zero to Amine Flashcards
(14 cards)
absolute zero
Absolute zero is 0K. It is the lowest possible temperature. Theoretically, at absolute zero, atoms stop moving.
accuracy
Accuracy is a measure of how close a measured value is to its true value. For example, if an object is exactly a meter long and you measure it as 1.1 meters long, that is more accurate than if you measured it at 1.5 meters long.
acid
There are several ways to define an acid, including any chemical that gives off protons or H+ in water. Acids have a pH of less than 7. They turn the pH indicator phenolphthalein colorless and turn litmus paper red.
acid anhydride
An acid anhydride is an oxide that forms an acid when it is reacted with water. For example, when SO3- is added to water, it becomes sulfuric acid, H2SO4.
actual yield
The actual yield is the amount of product you actually obtain from a chemical reaction, as in the amount you can measure or weigh as opposed to a calculated value.
addition reaction
An addition reaction is a chemical reaction in which atoms add to a carbon-carbon multiple bond.
alcohol
An alcohol is any organic molecule that has an -OH group.
aldehyde
An aldehyde is any organic molecule that has a -COH group.
alkane
An alkane is an organic molecule that only contains single carbon-carbon bonds.
alkene
An alkene is an organic molecule that contains at least one C=C or carbon-carbon double bond.
alkyne
An alkyne is an organic molecule that contains at least one carbon-carbon triple bond.
allotrope
Allotropes are different forms of a phase of an element. For example, diamond and graphite are allotropes of carbon.
alpha particle
An alpha particle is another name for a helium nucleus, which contains two protons and two neutrons. It’s called an alpha particle in reference to radioactive (alpha) decay.
amine
An amine is an organic molecule in which one or more of the hydrogen atoms in ammonia have been replaced by an organic group. An example of an amine is methylamine.
