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Lewis Structures
Fichas del conjunto (13)
- 1Chemical BondsThere are three types of bonds
- 2Ionic bondsElectrostatic attention between ions
metal/non-metal - 3Covalent bondsSharing of electrons
non-metal/non-metal - 4Metallic bondsmetal atoms bonded to several other atoms
metal/metal - 5Gilbert N. LewisPioneered the use of chemical symbols surrounded with dots to symbolize the valence electrons around an atom
- 6Atoms tend to ... ... surrounded by ...... add or subtract electrons
... eight valence electrons (the octet rule) - 7Covalent BondingAtoms chare electrons
There are several electrostatic interactions in these bonds:
- Attractions between electrons and nuclei
- Repulsions between electrons
- Repulsions between nuclei - 8Polar BondsEven sharing of electrons - nonpolar bond
Uneven sharing of electrons - polar bond
- one atom has a stronger pull on the electron toward its nucleus
- Several things (such as electronegativity) influence this phenomenon - 9Writing lewis structuresFind the sum of valence electrons
For anions, add one e- for each negative charge
For cation, subtract one e- - 10The central atom is...The least electronegative element
NO HYDROGEN IN THE MIDDLE - 11Assign formal chargescount the electrons in lone pairs and half the electrons it shares with others
subtract that from the number of valence electrons for that atom: the difference is its formal charge - 12The best lewis structure...... is the one with the fewest charges
...puts a negative charge on the most electronegative atom - 13What happens when you run out of electrons before the central atom has an octet?Form multiple bonds!
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- 11th grade Chemistry Fichas sobre Lewis Structures, creado por Elizabeth Gillett el 16/01/2025.
- Creado por
- Elizabeth Gillett
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