Chemistry 3 Page 13 notebook
Warm up – true/false for an atom 1. Numbers of protons can change 2. Numbers of neutrons can change 3. Numbers of electrons can change TRUE FALSE
Isotopes If an atom has different numbers of neutrons they are called ISOTOPES FYI – isotopes are often unstable and decay over time at known intervals (dating method)
FYI It is because of isotopes that atomic masses are not whole numbers
Ions Atoms with an unbalanced charge Proton number ≠ Electron number More protons = positive ion (cation +) More electrons = negative ion (anion -)
What is the difference between the atomic mass and atomic number?
Atom Lab Objective: understand how chemical formulas are written. Qualitative Observations Do not write on or damage laminated pages When finished work on Periodic Table due 14th Play video next slide while passing out directions and photo packets
Periodic Table of Elements
Hydrogen, Helium, Heavier MVQ1U MVQ1U QVkNQY QVkNQY