2 Objectives Explain Dalton’s atomic theory State the charge, mass, and location of each part of an atom according to the modern model of the atomCompare and contrast Bohr’s model with the modern model of the atom
3 What are atoms?Atoms are tiny undit that determine the properties of all matter.John Dalton developed an atomic theory: He believed that atoms could not be divided, however we know today that they can be broken down further into smaller particles.
4 An atom consists of subatomic particles: An atom is the smallest part of an element that still has the element’s propertiesAn atom consists of subatomic particles:Nucleus- an atom’s central region which is made up of protons and neutronsProton- a subatomic particle that has a positive charge and that is found in the nucleus of an atomNeutron- a subatomic particle that has no charge and that is found in the nucleus of the atomElectron- a subatomic particle that has a negative charge
11 The periodic table objectives: Relate the organization of the periodic table to the arrangement of electrons within an atomExplain why some atoms gain or lose electrons to form ionsDetermine how many protons, neutrons, and electrons, an atom has, given its atomic number and mass number
12 Color your periodic table according to page 113 in text be sure to make a key
13 Refer to the periodic table assignment and atom chart Know the following terms:periodic lawperiodgroup/familyionatomic numbermass numberisotopeatomic mass unitaverage atomic mass