Question

In the sixth period of periodic table 14 elements are placed in the group-3 of the period. These are known as 1) Alkali metals 2) alkaline earth metals 3) rare gas 4) rare earths

Answer 1

Answer:

hope it helps you

Explanation:

Lanthanoids

or rare earth metals

Answer 2

Option (4) Rare Earth metal

In the sixth period of the periodic table 14 elements are placed in group-3 of the period are rare earth metals.

Explanation:

• Rare earth metals are those elements that are placed in the 6th period and the 3rd group.
• The rare earth elements are all metals that are in the group which is often referred to as the "rare earth metals."
• They are metals that have many similar properties and are often found together in geological deposits.
• It is also referred to as "rare earth oxides" because many among them are typically oxide compounds.
• 15 lanthanide elements include lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium).
• These elements are called rare earth elements.