Since BBN depends on various assumptions related to the origin of the universe and the laws of fundamental interactions and elementary particles, those assumptions can be verified by comparing the abundances of light isotopes calculated with BBN and the astronomically observed ones. Since the neutrons ...
it must have the same number of electrons as it has protons. In order for an atom to have a neutral charge, it must have the same number of electrons as it has protons. Electrons = protons = atomic number Electrons = protons
Isotopes Atoms of the same element that have different numbers of neutrons Two ways to recognize isotopes: 1.Isotope Name: Chemical name – mass # –Example: Carbon -11, Carbon -12, Carbon Isotope Symbol: Example: Mass number atomic number X Chemical Symbol of element Isotopes: The Isotope s...
Atom Composed of protons, neutrons, and electrons, an atom is a particle that defines an element. Atomic Mass The atomic mass takes into account all the masses of the isotopes of an atom and their relative abundance. Atomic Number Number of protons located in the nucleus of an atom. Can ...
Technetium is a chemical element with the symbol Tc and atomic number 43. It is the lightest element whose isotopes are all radioactive. Nearly all available technetium is produced as a synthetic element. Naturally occurring technetium is a spontaneous fission product in uranium ore and thorium ore...
How can you tell from the Periodic Table how many shells an atom will have?How can you tell from the Periodic Table how many outer-shell electrons an atom will have?What two pieces of information do you need from the periodic table ...
“Double-beta decay is also possible and has been observed in a dozen different isotopes since 1986,” says Poon. “But it happens at a really low rate, and not too many nuclei can do it.” The only conclusive double-beta decays seen so far involve two neutrons that change into two pr...
ISOTOPE ATOMS OF THE SAME ELEMENT WITH THE SAME NUMBER OF PROTONS/ELECTRONS BUT A DIFFERENT # OF NEUTRONS CARBON ISOTOPE HOW MANY PROTONS, ELECTRONS AND NEUTRONS HOW MANY PROTONS, ELECTRONS NEUTRONS COMPARE THE TWO CARBONS 1. HOW DOES THE MASS COMPARE ...
Fission Reactant side: 2 terms 1 heavy isotope (examples: U-235 or Pu-239) Bombarding particle – usually a neutron Product side: at least 2 terms 2 medium-weight isotopes 1 or more neutrons Huge amount of energy is released Fission = Division ...