Look at the element's atomic number.
The number of protons in an element is its atomic number, which determines its identity. Neutrons can vary for different isotopes of the same element. Electrons equal the number of protons in a neutral atom.
54 Protons
Beryllium has four protons.
15 protons
Each chemical element has a specific number of protons; the number of protons is equal to atomic number of the element.
The element that has half as many protons as zinc would be copper. Zinc has 30 protons, while copper has 29 protons. This means that copper has one less proton than zinc, making it the element with half as many protons.
The number of protons is the atomic number of the element.
neptunium has 93 protons.
Nickel has 28 protons.
Dubnium has 105 protons.
Nobelium has 102 protons.
Americium has 95 protons.