Question

Millennium group in periodic table?

Answer 1

Group 9 element. Group 9, numbered by IUPAC nomenclature, is a group of chemical element in the periodic table. Members are cobalt (Co), rhodium (Rh), iridium (Ir) and perhaps also the chemically uncharacterized meitnerium (Mt). These are all transition metals in the d-block

Answer 2

Millennium present in $17^t^h$ group  in periodic table.

Explanation:

• In the periodic table, the element at position 117 with 117 electrons, 117 protons, and 174 neutron is Millenium.

• The atomic mass of this element is 291 and the atomic number is 117.

• The group number of the element Millenium is 17 and the period is 7.

• The element has a negative charge of -1.

• 7 valence shells were present due to reason of its period number 7, and has 7 valence electrons due to its group number 17.

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