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tin
There is no element with 28 protons in group 4. I think you are getting confused with group 4 and PERIOD 4. In period 4, the element with 28 protons is Nickel.
Assuming we're dealing with a neutral atom, you're thinking of manganese (Mn). It has 25 protons and is a transition metal in period 4, group 7B on the periodic table.
Rhenium (Re) has 75 protons.
Iron (Fe): atomic number 26 and of course has 26 protons.
tin
Copper (Cu) has 29 protons.
The element that has 86 protons in period 6 is Radon (Rn).
There is no element with 28 protons in group 4. I think you are getting confused with group 4 and PERIOD 4. In period 4, the element with 28 protons is Nickel.
Assuming we're dealing with a neutral atom, you're thinking of manganese (Mn). It has 25 protons and is a transition metal in period 4, group 7B on the periodic table.
Rhenium (Re) has 75 protons.
Iron (Fe): atomic number 26 and of course has 26 protons.
It's Zirconium.
The element with 45 protons is Rhodium which has the chemical symbol Rh. Rhodium is a transition metal in Group 9, Period 5 of the Periodic Table. Rhodium has 45 electrons in 5 shells with 1 electron in the outer shell.
The element with 72 electrons is Hafnium (Hf). Hafnium has an atomic weight of 72 and is a period 6, group 4 transition metal. It is the first element after the Lanthanides. Hafnium has 72 electrons in 6 shells with 2 electrons in the outer shell.
Period 10? Check the spelling !
This element is the noble gas xenon (Xe) with 54 protons.