Consider an atom whose designation is given as 94 Pu 242. How many Protons are found in this atom?
http://www.chemicalelements.com/elements/pu.html
Protons same in all isotopes. The number of nutrons varies to change to atomic weight
there are 94 because the atomic number is equal to the number of protons.
Thank You, Lance
To determine the number of protons in an atom, you need to know the atomic number of the element. In this case, the atom is designated as 94 Pu 242.
To find the atomic number, you can refer to the periodic table. Since "Pu" stands for the element Plutonium, you can look it up on the periodic table.
One resource you can use is http://www.chemicalelements.com/elements/pu.html.
On this webpage, you will find information about Plutonium. It will tell you that the atomic number of Plutonium is 94.
The atomic number is equal to the number of protons in an atom. Therefore, in this atom, 94 Pu 242, there are 94 protons.