How many protons, electrons, and neutrons does Plutonium have?

Answer 1

mass no=244
atomic no=94
electrons=94
neutrons=150
protons=94

Answer 2

Plutonium has the atomic number 94.
The atomic number corresponds to the number of protons in the nucleus of the atom, so Plutonium has 94 protons.

Since an atom has no net charge (electrically neutral), the number of protons must equal the number of electrons. Since Plutonium has 94 protons it must also have 94 electrons.

The most stable isotope of Plutonium is Plutonium-244, meaning that it has an atomic weight of 244 amu.
The atomic weight is calculated as the sum of the weights of number of protons and neutrons in the nucleus, so Plutonium must have 244 Protons + neutrons in the nucleus.
We already know that Plutonium has 94 protons, so we can solve the number of neutrons as,
Number of neutrons = atomic weight – number of protons
So Plutonium’s most stable isotope (Pu-244) has 150 Neutrons in the nucleus.

http://www.webelements.com/webelements/elements/text/Pu/key.html