Question

After 55 orbital, the next electron enters into ​

Answer 1

Answer:

the electronic configuration of 55 is =1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 6s1 . 55 is cesium metal. After 55 the electron will enter in the 6s2 orbital. In the periodic table after 6s2 the electron was entered in 4f orbital and we called 4f series are known  lanthanide elements.

Step-by-step explanation:

Cesium is an especially dangerous fission product because of its high yield during fission, moderate half-life, high-energy decay pathway, and chemical reactivity.

Answer 2

After 55 orbital, the next electron enters into 58 (Cerium).

• Z=55 is the Caesium.
• In case Caesium, after filling 6s orbital, electron enters into 5d orbital inturn filling seven 4f orbitals.
• Hence begins with Caesium Z=58.