Atoms

Cards (10)

  • The ancient Greek philosopher Demokritos (460-370 BCE) thought that matter was made up of millions of tiny, uncuttable pieces of that same matter.
  • what atomic model is this and who made it?
    A) plum pudding model
    B) JJ Thomson
  • what experiment does this diagram suggest?
    A) alpha particle experiment
  • Who discovered the nuclear atom, a small, positively-charged nucleus surrounded by empty space and then a layer of electrons to form the outside of the atom?
    Rutherford
  • Who suggested that electrons orbit the nucleus in fixed shells?
    Neils Bohr
  • Who discovered the neutron?
    James Chadwick
  • Most alpha particles going through the gold foil tells us atoms are mostly empty space.
  • What do A, Z and X stand for?
    A: mass number
    Z: atomic number
    X: symbol
  • Atoms with different amount of neutrons but same number of protons are called isotopes.
  • When an atom loses or gains electrons, this is atom is called an ion.