Question

What is the atomic number of the first element of the lanthanide series? 


(a) 56.0

(b) 89.0

(c) 88.0

(d) 57.0​

Answer 1

Answer:

option (d) correct

Explanation:

Lanthanum has atomic number 57. Lanthanoids start from next element with atomic number 58 (cerium). The atomic number of last element could be 57+14=71 (Lutetium).

Answer provided by gauthmath.

Answer 2

Answer:

it is answer I hope this answer is correct