Why would it be more appropriate to put the elements la and, Ask an Expert

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Why would it be more appropriate to put the elements La and Ac in the bottom two periods and put Lu and Lr in the transition metals?

Why don't we see the use of any sublevels higher than the f sublevel?

If enough elements are created to necessitate the use of the g sublevel, how many columns would this block need in the periodic chart?

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