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What element has the number of protons 78?
Iodine 131, a radioactive and unstable form
The atomic number of an element, i.e. the element's number on the periodic table is the also the number of protons that element has. For example, Oxygen is number 8 on the tab…le and has 8 protons.
Atomic Number is the number of protons in an atom
The number of protons in an atom of an element is the atomic number.
On the periodic table of the elements the number of protons is equal to the atomic number. EG: Hydrogen has 1 proton.
I think you meant "54 protons, 54 electrons, and 78 neutrons," because I don't think it's possible for any element to have such a high proton-electron different, especia…lly when that element is the noble gas Xenon. Anyways, if you did make a typo, the element you're thinking of should be Xenon-134
THE ELEMENT WHICH HAVE ATOMIC MASS 78.96 IS SELENIUM OF 6TH GROUP WITH ATOMIC NUMBER 34 AND SYMBOL (Se)
cesium has 55 protons, 55 electrons, and 78 protons. glad I could help! :D
In the element iron there are 26 protons. In the core there are 30 neutrons as well, and 26 electrons are circling around this core.
I am 99.9 sure it is Gold
The number of protons in an element is given by its atomic number. Since americium's atomic number is 95, it has 95 protons.
The atomic number (element number) gives the number of protons. In the case of tungsten it is 74.
The atomic number in an element is equal to the number of protons in an element. For example, Hydrogen has an atomic number of 1 and 1 proton.