In what periods are the lanthanides and actinides? Where are they placed in the periodic table? Why?

Question

In what periods are the lanthanides and actinides? Where are they
placed in the periodic table? Why?

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Thông Đạt 3 years 2021-08-18T00:37:56+00:00 1 Answers 3 views 0

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  1. dangkhoa
    0
    2021-08-18T00:39:03+00:00
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    Lanthanides are in period 6 and actinides are in period 7. They are at the down part of the page so that the periodic table can fit on the page.

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )