no
A metal can have different numbers of protons, as the number of protons dictate which element it is (refer to a periodic table). For example, Lithium (Li) is a metal, with 3 protons, whilst Gold (Au) is also a metal with 79 protons. The number of protons the metal has depends on which metal(/element) it is.
Lithium: It has 4 neutrons and 3 protons.
It is gold metal. It contains 79 protons in a single atom.
gold
The transition metal with 39 protons is Yttrium (Y), which has chemical symbol Y and atomic number 39.
Silver is a expensive metal. It contains 47 protons.
Sodium element is a metal. Atom contains 11 protons.
The largest transition metal is copernicium with 112 protons.
Mass numberof anything - metal or non metal is, (total number of protons) + (total number of neutrons) For example, mass number of carbon is 12 (6 protons + 6 neutrons) Mass number of a metal,say- magnesium is 24(12 protons + 12 neutrons)
Lithium has the lowest number of protons of any metal: 3. Hydrogen an helium have fewer protons bu they are not metals.
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.
It is calcium.