#32 Groups and Period Periodic Table Properties

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Presentation transcript:

#32 Groups and Period Periodic Table Properties

Round each atomic mass to the nearest whole number then find the P, N,E for each

Important Features of the Periodic Table: Period (Row) each horizontal row of elements on the periodic table How many periods (rows) are on the Periodic Table Of Elements? FROM LEFT TO RIGHT OR RIGHT TO LEFT

Period A horizontal row in the Periodic Table.

*Period (Row) Properties There are seven horizontal periods on a periodic table (numbered from the top down) Atomic numbers and atomic masses increase as you move from the left to the right in a period All atoms of the elements in the same period have the same number of shells Example Period 1 = 1 shell Period 2 = 2 shells Period 3 = 3 shells Etc…

How many groups (families) Important Features of the Periodic Table: Group (Family) each column of elements on the periodic table How many groups (families) are on the Periodic Table Of Elements? FROM TOP TO BOTTOM OR BOTTOM TO THE TOP

Group A vertical column in the Periodic Table.

*Group (Family) Properties There are eighteen vertical groups on the periodic table (numbered from left to right) Atomic numbers and atomic masses increase as you move from the top down in a group (family) Atoms of elements in the same group have the same number of valence electrons Exceptions: Transition elements (3-12) Hydrogen (could be similar to groups 1 or 17) Helium (actually has 2 valence electrons)

*How can I remember this… Purple Periods Pull Green Groups Grow

#33 Bohr Model and Electronic Configuration

*If you know the elements period and group location, then that helps determine how many shells the atom has, and the number of electrons in each shell. For example: Lets look at Lithium How many shells does it have? Electrons? End Goal: Li

*Period # # of shells *Maximum Electrons 1 2 3 4

*ELECTRONIC CONFIGURATION *Electronic configuration is a short-hand way of telling you how many electrons you have in each shell of an atom. *You must completely fill the first shell before moving to the next shell.

Remember 1st shell - 2 electrons max 2nd shell - 8 electrons max 3rd shell - 8 electrons max 4th shell - 18 electrons max And so on… How many electrons does it have? How many shells will it have?

*ELECTRONIC CONFIGURATION Nitrogen has 7 electrons Configuration: N= 2,5 7 N 2 in 1st shell 5 in 2nd shell 2 + 5 = 7 14

Write the Electronic configuration for these

Bohr Model When drawing out an atom it is important to understand electronic configuration. *The Bohr model is a visual representation of an atom showing all protons, electrons, neutrons, and electron cloud. Ex: Beryllium Bohr model: Configuration:

Bohr Model When drawing out an atom it is important to understand electronic configuration. *The Bohr model is a visual representation of an atom showing all protons, electrons, neutrons, and electron cloud. Ex: sulfur Bohr model: Configuration:

Bohr Models