Rhenium (Re) is a transition element from period 7 with the fewest protons among its atoms. It has 75 protons in its nucleus.
The element with 28 protons is Nickel (Ni), which is a transition metal in group 10 of the periodic table, not group 4. The Group 4 metal with 28 protons is Titanium (Ti).
The fifth period transition element with the greatest atomic number is tantalum (element 73).
The element with 75 protons in period 6 is Rhenium (Re), which has an atomic number of 75.
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) is a transition element from period 7 with the fewest protons among its atoms. It has 75 protons in its nucleus.
Copper (Cu) has 29 protons.
The element with 28 protons is Nickel (Ni), which is a transition metal in group 10 of the periodic table, not group 4. The Group 4 metal with 28 protons is Titanium (Ti).
The fifth period transition element with the greatest atomic number is tantalum (element 73).
The element that has 86 protons in period 6 is Radon (Rn).
The element with 75 protons in period 6 is Rhenium (Re), which has an atomic number of 75.
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.
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.
Element 92, uranium, has the greatest number of protons in period 5 of the periodic table.
The isotope of zirconim, 91Zr, has 51 neutrons. In order to solve this problem, one must know that an element's atomic weight is the average of its number of protons and neutrons (only neutrons are variable). Since the atomic number is the number of protons, the atomic number subtracted from the atomic weight gives the number of neutrons. An element in period 5 that has this many neutrons is found to be zirconium (the isotope 91Zr).
Iron (Fe): atomic number 26 and of course has 26 protons.
The element with atomic number 28 is Nickel (Ni). It is a transition metal in period 4 of the Periodic Table. It is the first element in the Nickel family. It has 28 electrons in 4 shells with 2 electrons in the outer shell.