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General chemistry
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General chemistry
Alkaline earth metal
Chemistry; General chemistry
The Group 2 elements, beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra) form alkaline oxides and hydroxides and are called "alkaline earth metals".
Emission spectrum
Chemistry; General chemistry
A plot of relative intensity of emitted radiation as a function of wavelength or frequency .
Network covalent solid
Chemistry; General chemistry
A substance which consists of an array of atoms held together by an array of covalent bonds . A crystal of a network covalent solid is actually a single, gigantic molecule. Diamond and quartz are ...
Thermionic emission
Chemistry; General chemistry
The emission of electrons or ions by a hot object. For example, the filament in a mass spectrometer spits out energetic electrons that ionise atoms and molecules in the sample.
Alkaline error
Chemistry; General chemistry
A systematic error that occurs when glass electrodes are used to read the pH of an extremely alkaline solution ; the electrode responds to sodium ions as though they were hydrogen ions, giving a pH ...
Emollient
Chemistry; General chemistry
A substance added to a formulation that gives it softening ability. For example, oils that can soften skin are added as emollients in some skin creams.
Neurotransmitter
Chemistry; General chemistry
Neurotransmitters are molecules that are used to carry signals from one neuron to another. One neuron releases the neurotransmitter near another neuron's receptors. The neurotransmitter diffuses ...
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