ca. 395 yoctograms; 1 yg = 10-24 g
Atomic weight (not mass) of uranium is 238,02891.
1 atom gram of natural uranium = 238,028 91 grams
If you mean the nucleus of an atom, different atom have different masses - an uranium atom has more than 200 times the mass of a hydrogen-1 atom (and most of that mass is in the nucleus).
There are 143 neutrons.
Only in the mass of the nucleus, due to 3 extra neutrons in U238.
That depends on the atom you are refering to. Hydrogen is the lightest, heavy metals like uranium are a few hundred times heavyer.
Yes. Very large amount of energy is derived from uranium. The atom of uranium brake down to give you atom of lead. There is loss of some mass in the process. That mass is converted into energy as per Einstein's equation. That is E = m C square. It is tremendous energy.
Uranium-235 has 143 neutrons and uranium-238 has 146 neutrons.
Uranium atom is the heaviest.
An atom has neutrons, protons, electrons. A chemical element has isotopes. With some exceptions isotopes has no name, but a number, equal to atomic mass.
what is the atomic mass of an element : atomic mass is equal to the number of protons and number of neutrons present in an element
Uranium is an atom with 92 protons and 92 electrons. They number of neutrons may vary, depending on the isotope of uranium.