key concepts Flashcards
what is the atomic theory
everything is made of tiny particles that cannot be broken down father, and they are separated by empty space
who created atomic theory
democritus from ancient greece
what did john dalton suppose in the 1800s
everything is made of solid spheres and different spheres make different elements
what is the plum pudding model
he said atoms could not be
what is the atomic number
the number on the bottom, representing the number of protons
what is an isotope
different forms of the same element, that have the same number of protons, but a different number of neutrons
how do isotopes react in comparison to the original element
the same way due to the same amount of protons
what is the relative atomic mass
the average mass of all the isotopes that make up an element
what is abundance
how common an isotope is
what is the equation for the relative atomic mass
sum of isotope abundance (times) isotope mass/ sum of all abundance of all isotopes
