Next page in journal: Notes: PNE 10/2 Essential Question What do the numbers on the periodic table tell us about mass and subatomic particles?
Atomic Structure 2a,e Inside the nucleus: Outside the nucleus: Protons – positive particles (+1 charge) Neutrons –particles with no charge ( 0 ) Outside the nucleus: Electrons – tiny negative particles (-1 charge) damienkatz.net
5a,d Atomic Mass atomic mass = mass of protons + neutrons Measured in atomic mass units (amu) 1 Proton = 1 amu 1 Neutron = 1 amu 1 Electron = 0.00054 amu tiny mass ~ 0 = 1 / 1840 amu 1 amu = 1.673 x 10-27 kg
3d, 6 Counting particles Atomic # = # of Protons = # of Electrons Atomic mass = protons + neutrons, so… # of Neutrons = mass – protons = mass – Atomic #
Reading the Periodic Table Find Argon on your periodic table and figure out the following Atomic # = Atomic mass = # Protons = # Neutrons = # Electrons = xdb.lbl.gov
Reading the Periodic Table Find Argon on your periodic table and figure out the following Atomic # = 18 Atomic mass = 40 # Protons = 18 # Neutrons = 22 # Electrons = 18 xdb.lbl.gov
Reading the Periodic Table Find Chlorine on your periodic table and figure out the following Atomic # = Atomic mass = # Protons = # Neutrons = # Electrons = research.cm.utexas.edu
Reading the Periodic Table Find Chlorine on your periodic table and figure out the following Atomic # = 17 Atomic mass = 35 # Protons = 17 # Neutrons = 18 # Electrons = 17 research.cm.utexas.edu
Reading the Periodic Table If the atomic # is 47, which element is it? Ag (Silver) If the atomic mass is 24.305, which element is it? Mg (Magnesium) If there are 13 protons, which element is it? Al (Aluminum)
Reading the Periodic Table If there are 20 neutrons and 20 electrons, which element is it? Ca (Calcium) If there are 99 electrons, which element is it? Es (Einsteinium)