Answer:
Lathanum .
Atomic number = 57
Symbol = La
Atomic weight = 138.9
No of energy orbitals = 6
Electronic configuration
![[Xe]6s^25d^1](https://tex.z-dn.net/?f=%5BXe%5D6s%5E25d%5E1)
One of the two products of this reaction is carbonic acid (H2CO3), which immediately forms water and the gas you identified after exposure to the flaming and glowing splints. Write a balanced equation showing the decomposition of carbonic acid.
A lot of people take a low dose of aspirin every day to lower their risk of a further heart attack or stroke.
The reagent in the chemical reaction which oxidizes other reactants but itself reduces are called oxidizing agent.
Hope this helps, ask doubt in comment section below if you have one.