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impossible chemistry question!!!

Please help and explain, i cant do this :

An ion, X3+, contains 55 electrons.

In which block of the Periodic Table would
element X be found?
A s
B p
C d
D f
Original post by flyingpanda786
Please help and explain, i cant do this :

An ion, X3+, contains 55 electrons.

In which block of the Periodic Table would
element X be found?
A s
B p
C d
D f


If the 3+ charge ion has 55 electrons how many does the atom have?
The answers f, if it has a 3+ charge then it has lost 3 electrons so would originally have 58 electrons. This would mean it would be Cerium in the periodic table which is a lathanide and has a f orbital
Original post by majorchewy
The answers f, if it has a 3+ charge then it has lost 3 electrons so would originally have 58 electrons. This would mean it would be Cerium in the periodic table which is a lathanide and has a f orbital


ohhh right, that really helps a lot, thank you very much!

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