details of the 3 sub-atomic (fundamental) practices Flashcards
position, relative mass + relative charge of a proton
position: nucleus
relative mass: 1
relative charge: +1
position, relative mass + relative charge of a neutron
position: nucleus
relative mass: 1
relative charge: 0
position, relative mass + relative charge of a electron
position: orbitals
relative mass: 1/1840
relative charge: -1
atomic number is also known as
Z
atomic number
number of protons in the nucleus (bottom number)
mass number is also known as
A
mass number
total number of protons and neutrons in the atom (top number)
how to find number of neutrons
mass number - atomic number
isotope
atoms with the same number of protons, but different number of neutrons
relative isotopic mass
mass of one atom of an isotope compared to 1/12 of the mass of one atom of carbon-12
relative atomic mass
average mass of one atom of an element compared to 1/12 of the mass of one atom of carbon-12
relative molecular mass
average mass of a molecule compared to 1/12 of the mass of one atom of carbon-12