Electrons & Elements Physical Science 2017.

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Presentation transcript:

Electrons & Elements Physical Science 2017

Periods and Groups Period = a horizontal row Group = a vertical column

Label your table Label each period 1-7 from left to right Then label each group 1-18 from top to bottom

Electron Shells Shell = space around the nucleus where electrons are often found

Shell Breakdown Shell 1 = 2 Shell 2 = 8 Shell 3 = 18 Shell 4 = 32 Beyond 4 shells, there are other rules that come into play.

Bohr Electron Model

Examples Hydrogen Boron Oxygen Phosphorus Argon

Light Atoms can be identified by the light they emit when energized

Light Atomic Spectrum = the pattern of frequencies formed by an element

Valence Electrons The electrons found in the outermost energy level/shell of an atom. Used in chemical bonding.

Lewis Structures Diagram showing bonding options and electron pairs. Highlight your valence e- labels on your periodic table.

How to draw a Lewis Structure: Must follow octet rule Draw dots in a clockwise order Mg Br

Classwork Draw the Bohr Model of at least 1 element from period 1, 2, 3, and 4. Draw the Lewis Structure for at least 1 element from each period 5, 6, and 7.