The isotopes are uranium-235 or plutonium-239.
- for spontaneous fission the cause is an inconvenient ratio between neutrons and protons- bombardment of the nucleus with particles, especially neutrons
Isotopes are caused by variations in the number of neutrons in an atom's nucleus. Neutrons are subatomic particles that do not carry an electric charge and contribute to an atom's mass. The different number of neutrons in isotopes result in variations in atomic mass.
electrons are found in the nucleus of an atom
The nucleus of any atom is in the center; the nucleus of krypton has 36 protons and a variable number of neutrons, depending on the isotopes.
Rutherford. Discovered small charged nucleus of atom. Split the atom.
An atom with a variable nucleus is an isotope. Isotopes are atoms of the same element that have different numbers of neutrons in their nucleus, which can lead to variations in atomic mass.
Protons and neutrons are contained within the nucleus of an atom. The nucleus is located at the center of the atom and it is where most of the atom's mass is concentrated. Electrons, which are negatively charged particles, orbit around the nucleus in electron shells.
An isotope has either more or fewer neutrons than a stable atom, and neutrons are part of the nucleus.
Isotopes are found in the nucleus of an atom. They are atoms of the same element with the same number of protons but different numbers of neutrons. The different isotopes of an element have the same chemical properties but different physical properties.
The difference is the number of neutrons contained in the atom's nucleus
An atom's mass number is the total number of protons and neutrons in its nucleus. It is used to identify isotopes of an element since isotopes of the same element have the same number of protons but different numbers of neutrons.
Isotopes and nuclei are both related to atoms. Isotopes are atoms of the same element with different numbers of neutrons in their nuclei. The nucleus is the central part of an atom that contains protons and neutrons.