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 oxidizes rapidly in air and it reacts with water to form the hydroxide. The Atomic Number of this element is 57 and the Element Symbol is La. The Properties of the Lanthanum Element Symbol of Element : La Atomic Number : 57 Atomic Mass: 138.9055 amu Melting Point: 920.0 Â°C - 1193.15 Â°K