Question

In extended form of the periodic table, one of the following does not having appropriate position 1) Inner-transition elements 2) transition metals 3) Noble gases 4) challogens

Answer 1

Answer:

The first of the inner transition series includes the elements from cerium (symbol Ce, atomic number 58) to lutetium (symbol Lu, atomic number 71).

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General properties of the group.

1st main series

copper

symbol Cu

atomic number 29

atomic mass 63.546