Question 1
What element has the following ground-state electron configuration?
[Kr]5s24d105p1
Question 2
Which Element Has The Following Ground State Electron Configuration?
1s22s22p2
Question 3
Which element has the following ground state electron configuration to its 2+ cation: [Kr] 4d^3
y, v, sc, mn, tc, nb (all 2+ charge)
Answer to question 1
The answer is Indium (In).
Krypton is a noble gas with atomic number 36.
The required element has a total number of electrons; 36+2+10+1=49
It leads to the period 5 and group 13 of the periodic table. Thus, we can say that the element with 49 electrons in its ground state is Indium.
Answer to question 2
Answer to question 3
Solution : Nb(Niobium)
Expalnation: Electronic configuration of all elements :
Nb – [Kr] 4d4 5s1And Nb2+ – [Kr] 4d3
Tc – [Kr] 4d5 5s2And Tc2+ – [Kr] 4d5
Y – [Kr] 4d1 5s2 And Y2+ – [Kr] 4d1
Mn – [Ar] 3d5 4s2 And Mn2+ – [Ar] 3d5
(V) – [Ar] 3d3 4s2 And (V2+) – [Ar] 3d3
(Sc)- [Ar] 3d1 4s2 And (Sc2+)- [Ar] 3d1