Question

the elements in which electrons are progressively filled in 4f-orbital are called

a) actinoids
b) transition elements
c) lanthanoids
d) halogens

ans if u r sure
thank you in advance

Answer 1

$Lanthinides/Lanthanoids$

Answer 2

Answer:

Lanthinides/LanthanoidsLanthinides/Lanthanoids

Explanation:

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