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
