Question

6th period and 3rd group of mendeleev periodic table 14 elements are good together the elements are known as

Answer 1

Answer:

They are known as Lanthanoids

Explanation:

Because they have general electronic configuration 4f^1-14 5d^0 or 1 6s^2

Answer 2

6th period and 3rd group of Mendeleev periodic table 14 elements are good together the elements are known as Lanthanoid.

Explanation:

• Lanthanoides are also known as Lanthanides
• The lanthonoids series consists of 15 metallic elements with atomic numbers  57 to 71.
• These elements are also called rare earth elements or metals.
• They are called lanthanide because they resemble  lanthanum
• All lanthanide elements form three cations
• Together with two elements Scandium and yttrium its trivial names rare earth is used to describe the series.
• They are group three and period sixth in the mendeleevs periodic table.