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CHEMISTRY PART 2 Periodic Table

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Periodic Table  Elements are in order of increasing atomic mass.

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CHEMISTRY PART 2Periodic Table

Periodic Table

Atomic Number = # of protons

If the atom is neutral: Atomic Number = # of electrons

Atomic Mass = # of protons + # of neutrons

# of neutrons = atomic mass - # of protons

Periodic Table

Elements are in order of increasing atomic mass.

Periodic Table

Periods:

Horizontal rows. (1 to 7) Number of electron shells.

Periodic Table

Groups:

Vertical columns. (1 to 18) Share characteristics and properties. Same number of electrons in outer shell.

Periodic Table

Metals Share specific properties.

Non-Metals Share specific properties.

Metalloids Have properties of both metals and non-

metals.

Page 9: CHEMISTRY PART 2 Periodic Table. Atomic Number = # of protons If the atom is neutral: Atomic Number = # of electrons Atomic Mass = # of protons

Page 10: CHEMISTRY PART 2 Periodic Table. Atomic Number = # of protons If the atom is neutral: Atomic Number = # of electrons Atomic Mass = # of protons

Periodic Table Alkali Metals

Group 1 Very reactive

Page 11: CHEMISTRY PART 2 Periodic Table. Atomic Number = # of protons If the atom is neutral: Atomic Number = # of electrons Atomic Mass = # of protons

Periodic Table Alkaline Earth Metals

Group 2 Reactive

Page 12: CHEMISTRY PART 2 Periodic Table. Atomic Number = # of protons If the atom is neutral: Atomic Number = # of electrons Atomic Mass = # of protons

Periodic Table Transition Metals

Groups 3 to 11 Have more than

one charge

Page 13: CHEMISTRY PART 2 Periodic Table. Atomic Number = # of protons If the atom is neutral: Atomic Number = # of electrons Atomic Mass = # of protons

Periodic Table Halogens

Group 17 Form strong

acid compounds

Page 14: CHEMISTRY PART 2 Periodic Table. Atomic Number = # of protons If the atom is neutral: Atomic Number = # of electrons Atomic Mass = # of protons

Periodic Table Nobel Gases

Group 18 Unreactive (for the

most part)

Page 15: CHEMISTRY PART 2 Periodic Table. Atomic Number = # of protons If the atom is neutral: Atomic Number = # of electrons Atomic Mass = # of protons

Periodic Table Hydrogen is an exception:

It can behave like an alkaline metal or a halogen.

Periodic Table

Elements of the Periodic Tablehttp://www.periodicvideos.com/videos/003.htm

http://www.periodicvideos.com/videos/003.htm

Page 17: CHEMISTRY PART 2 Periodic Table. Atomic Number = # of protons If the atom is neutral: Atomic Number = # of electrons Atomic Mass = # of protons

Practice

Page 97 # 15, 18, 19

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