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.

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Presentation transcript:

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