Drawing Bohr Models.

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Presentation transcript:

Drawing Bohr Models

Bohr Models Bohr models can predict reactivity in elements. Reactivity = how likely an element is to form a compound with another element. Valence electrons are the electrons on the last energy level

Drawing Bohr Models Draw the nucleus. Write the number of neutrons and the number of protons in the nucleus. Draw the first energy level. Draw the electrons in the energy levels according to the rules below. Make sure you draw the electrons in pairs. Keep track of how many electrons are put in each level and the number of electrons left to use.

Guided Practice In order to draw Bohr models of these elements, you must first determine the number of protons, neutrons, and electrons. Once you have found this information, follow the directions to draw your model. 6 6 6 6 C Carbon 12.011 Protons: _____ Neutrons: _____ Electrons: ______ How many energy shells will this have? ____ How many valence (outer) electrons does this element have? ____ Bohr Model: 2 4

Guided Practice Protons: _____ Neutrons: _____ Electrons: ______ 3 Li Lithium 6.941 Protons: _____ Neutrons: _____ Electrons: ______ How many energy shells will this have? ____ How many valence (outer) electrons does this element have? ____ Bohr Model: 3 4 3 2 1

Guided Practice 10 10 10 10 Ne Neon 20.180 Protons: _____ Neutrons: _____ Electrons: ______ How many energy shells will this have? ____ How many valence (outer) electrons does this element have? ____ Bohr Model: 2 8

Guided Practice 16 S Sulfur 32.066 16 16 16 Protons: _____ Neutrons: _____ Electrons: ______ How many energy shells will this have? ____ How many valence (outer) electrons does this element have? ____ Bohr Model: 3 6

Guided Practice 15 16 15 15 P Phosphorus 30.974 Protons: _____ Neutrons: _____ Electrons: ______ How many energy shells will this have? ____ How many valence (outer) electrons does this element have? ____ Bohr Model: 3 5

Guided Practice 11 12 11 11 Na Sodium 22.990 Protons: _____ Neutrons: _____ Electrons: ______ How many energy shells will this have? ____ How many valence (outer) electrons does this element have? ____ Bohr Model: 3 1