Question

do we need to consider lanthanides and anctindes in 6th period​

Answer 1

Answer:

Russian "nesting dolls" (often known as matryoshka dolls) have a long history in Russia. These dolls are designed to nest inside of one another. When we open the largest doll, we find a somewhat smaller doll inside it. These dolls can often go down seven or eight layers, but some can go upwards of over thirty-five layers.