There are a couple elements who could have isotopes with 148 neutrons. The most stable isotopes of both americium and plutonium have 148 neutrons.
No, joliotium is not a man-made element. It is not a recognized element in the periodic table.
No, sulfur is a naturally occurring element found in the earth's crust. It is not man-made.
Yes, rutherfordium is man made.
An element can be radioactive regardless of its number of protons. Radioactivity depends on the specific isotopes of an element, which can have different numbers of neutrons. Elements with unstable isotopes that undergo radioactive decay typically have too few or too many neutrons compared to the number of protons.
No. It is an element.
Many isotopes have 148 neutrons; example: mendelevium -249.
Although promethium exist in traces in the Earth crust it is an artificial element.
Yes, plutonium is a man-made element. It is primarily produced in nuclear reactors by bombarding uranium-238 with neutrons. Isotopes of plutonium are used in the production of nuclear weapons and as fuel in nuclear reactors.
Each isotope of an element has a specific number of neutrons (number of neutrons = atomic weight - atomic number).
Mendelevium is a man made chemical element.
No, joliotium is not a man-made element. It is not a recognized element in the periodic table.
Plutonium is a man made chemical element, radioactive, actinoids family, unstable, metal, solid, toxic, fissionable with neutrons, atomic number 94.
Thallium is a naturally occurring element in the Earth's crust. It is not a man-made element.
Seaborgium is a man made element.
No, sulfur is a naturally occurring element found in the earth's crust. It is not man-made.
The main difference between isotopes of the same element is the number of neutrons in the nucleus. Isotopes have the same number of protons and electrons but different numbers of neutrons, which affects their atomic mass.
No, Uranium is naturally occurring. But all elements beyond uranium are man-made.