Can someone please quickly answer this question? Does it matter the order for an electronic configuration? So, like for the electronic configuration of Tin, can I either use [Kr]4d^105s^25p^2 or [Kr]5s^24d^1050^2

I’m just confused, when I look it up they show both so I don’t know which one is correct so I can use for my lab report?

The difference between the two is:

is the Orbital Occupancy

is the Orbital Filling Order

Both are correct, I don't think your teacher will be so nit-picky to care.

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

the correct answer is:

a. formation of precipitation