Use the periodic table to identify the name of atomic number for each element below. (give the name not the chemical symbol for each element)

Hafnium-72

15-Phosphorus

45- Rhodium

Osmium-76

Magnesium-12

Explanation:

Explanation:

Hafnium is a transition element and belongs to period six. It's atomic number is 72.

Element with atomic number 15 belongs to group 5 and period third. Name of this element is phosphorous. Symbol that represents phosphorous is P.

Element with atomic number 45 is a transition element and it belongs to period 5. Name of this element is rhodium and it is represented by the symbol Rh.

Osmium is also a transition element and belongs to period six. It's atomic number is 76.

Magnesium is a group 2 element and belongs to third period. Atomic number of magnesium is 12.

Hence, we can conclude that complete information in the given table will be as follows.

hafnium : atomic number 72

phosphorous : atomic number 15

rhodium : atomic number 45

osmium : atomic number 76

magnesium : atomic number 12

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layer 3 is younger than layer 6.