Difference between Atomic Number 71 and Lutetium

ATOMIC NUMBER 71 vs LUTETIUM: NOUN

A trivalent metallic element of the rare earth group; usually occurs in association with yttrium

A metallic chemical element (symbol Lu) with an atomic number of 71.
A metallic element separated from ytterbium in 1907, by Urbain in Paris and by von Welsbach in Vienna. It is a member of the Lanthanide rare earth group. Symbol, Lu; atomic number 71; atomic weight 174.967 [C=12.011]. Previously spelled Lutecium.
A silvery-white rare-earth element that is exceptionally difficult to separate from the other rare-earth elements, used in nuclear technology. Atomic number 71; atomic weight 174.97; melting point 1,663°C; boiling point 3,402°C; specific gravity 9.841 (at 25°C); valence 3. : Periodic Table.
A trivalent metallic element of the rare earth group; usually occurs in association with yttrium

Magnesium, Iodine, Curium, Erbium, Transuranic, Radon, Rare earth, Rare earth element, Lanthanon, Lanthanoid, Lanthanide series, Lanthanide, Nickel, Lutecium, Lutetium

Monazite, Osmium, Cerium, Dysprosium, Holmium, Samarium, Terbium, Ytterbium, Thulium, Yttrium, Europium, Praseodymium, Lutecium, Atomic number 71, Lu

Iron, Hafnium, Fluorine, Boron, Argon, Nitrogen, Magnesium, Iodine, Erbium, Transuranic, Radon, Rare earth, Lanthanide, Nickel, Lutetium

Hornblende, Epidote, Pyroxene, Lanthanides, Yttrium oxide, Rubidium, Monazite, Osmium, Cerium, Holmium, Samarium, Ytterbium, Thulium, Yttrium, Praseodymium

The renal risk is lower for patients treated with Lutetium than those treated with Yttrium.
The elements are lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium, and yttrium.
Lithium, Lutetium, Magnesium, Manganese, Molybdenum, Neodymium, Niacin, Nickel, Niobium, Osmium, Palladium, Phosphorus, Platinum, Potassium, Praseodymium, Rhenium, Rhodium, Rubidium, Ruthenium, Samari
The elements in these earths are nowknown as ytterbium and lutetium, respectively.
Lutetium (Lu) and lawrencium (Lr) occupy the two positions below yttrium.
MRI system is based on lutetium oxyorthosilicate scintillators and avalanche photodiodes.
Lutetium is rare and expensive; consequently, it has few specific uses.
What would a high school student need to do with Lutetium?
Virtually no other commercial uses have been found yet for lutetium.
During Roman times, the city was known as Lutetium.