Atomic Structure

The scientist whose experiment provided evidence for a small, dense nucleus.

Ernest Rutherford

nonmetals

The elements that generally gain electrons when forming ions

subatomic particles

protons, neutrons, and electrons are examples of these

a charged atom or group of atoms

ion

protons

the atomic # tells the number of…

mass number

the total number of protons and neutrons in an atom is called the…

gold foil experiment

rutherford used this experiment to investigate the structure of the atom

cation

an atom becomes this type of ion when it loses one or more electrons

james chadwick

the scientist credited with discovering the neutron

isotopes

atoms of the same element that differ in their numbers of neutrons

j.j. thomson

the scientist associated with the discovert if the electron through cathrose ray experiments

democritus

the ancient greek thinker often credited as the first to propose that matter is made of tiny indivisible particles

anion

an atom becomes this type of ion when it gains one or more electrons

metals

the elements that generally lose electrons when forming ions