Part Time Accounting Assistant. Accounting Now has an exciting opportunity with a Manufacturing firm in the Northwest suburbs. Our client is looking to add a Part Time Accounting Assistant to their team and ready to start someone quickly! The chosen candidate will demonstrate entry leve.
Lanthanum is considered a rare earth metal because the process to mine it is difficult, time-consuming and expensive. Lanthanum is rarely the dominant lanthanide found in the rare earth minerals, and in their chemical formulae it is usually preceded by cerium. Rare examples of La-dominant minerals are monazite-(La) and lanthanite-(La).
Lanthanum was discovered by Carl Gustaf Mosander in 1839 when he was studying a sample of cerium. Lanthanum is a transition metal found in the lanthanide series of the periodic table. It is a rare earth metal that has 57 protons in its nucleus with the chemical symbol La. Lanthanum is soft and ductile. Lanthanum is toxic if inhaled. Lanthanum ions have been used as medical tracers to monitor calcium ions.