What is the NMR frequency of a \({ }^{19} \mathrm{~F}\) nucleus in a magnetic field of 17.1T? Express your answer in megahertz.
Text Transcription:
^19F
1/30 Chapter 2 Continued Alkali Metals ● The group 1A elements called the Alkali Metals, are all reactive metals ● A marble sized piece of sodium explodes violently when dropped into water. ● Lithium, potassium, and Rubidium are also Alkali Metals. Alkali Earth Metals ● The group 2A elements are called the alkaline earth metals ● They are are fairly reactive, but not quite as reactive as the alkali metals Halogens ● The group 7A elements are called halogens, are reactive non-metals ● They are always found in nature as a salt ● Chlorine, a greenish-yellow gas with pungent odor ● Bromine, a red brown liquid that easily evaporates into a gas ● Iodine, a purple solid ● Fluorine, a pale yellow gas Ions and the Periodic Table ● In general, the alkali metals (group 1A) have a tendency to lose one electron and form 1+ ions. ● The alkaline earth metals (group 2A) tend to lose two electrons and form 2+ ions. ● The halogens (group 7A) tend to gain one electron and form 1- ions. ● The oxygen family non-metals (group 6A) tend to gain two electrons and form 2- ions. ● For the main-group elements that form cations with predictable charge, the charge is equal to the group number. ● For main-group elements that form anions with predictable charge, the charge is equal to the group number minus eight. ● Transition elements may form various different ions with different charges. Atomic Mass: The Average Mass of an Elementʼs Atoms ● Atomic mass is sometimes called atomic weight or standard atomic weight. ● The atomi
