District 3: Bonding
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Welcome to your training for how to take down District 3 when you are in the arena. The elements of District 1 and 2 have nothing on these guys. This is the place where all the elements are combined, broken apart, and recombined in an infinite number of arrangements. From this District, we get all the compounds that exist within our known universe. They are advised by past champion (and man who is on constant suicide watch) Gilbert Lewis. You will need to be beware of District 2's ability to mix elements together to make a nasty compound that will do terrible (and likely irreversible) damage to you.
Past District 3 Champion
YOUR TRAINING BEGINS NOW
DIrections: Please take out your District 3 guided notes and review the following content:
Ionic BondingElectrons are often transferred between elements so that both of them are able to complete their octet. This transfer of electrons causes an ionic bond to form.
Metals typically donate or give away their electrons in order to achieve a full outer valence. Non-metals typically accept electrons in order to achieve a full outer valence. This exchange of electrons leads to an ionic bond. Ionic Bond – A bond that forms between an anion and cation as a result of the elements exchanging electrons. |
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How do we write the chemical formula for ionic compounds?
Crystal Lattices
Ionic compounds have a positive and negative charge. Salt crystals are repeating structures of positive and negative charges.
Positive charged ions in an ionic compound are attracted to other negative charged ions. This attraction between positive and negative charges holds crystal lattices together. This attraction between positive and negative charged ions is known as electrostatic attraction. |
COVALENT BONDS
Covalent bonds are a bond between two or more non-metals. In a covalent bond, the electrons are shared between the elements so that each can achieve a full outer valence shell.
Most molecules in biology are covalent compounds. Things such as proteins, carbohydrates, and DNA all are held together by the sharing of electrons. |
How do we draw Lewis Dot Structures for Covalent molecules?
Lewis Dot structures only show the valence electrons. The group number (Group 1A, 2A, etc.) tells us the number of valence electrons for elements.
To draw atoms INDIVIDUALLY:
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PRACTICE!
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Complete the following practice problems in order to train to take down the District 3 tributes:
Answer Key
Answer Key
Gilbert Lewis' Plan
As you begin to eat the small amount of food you have found, you smell a hint of almond and drop the food. You realize that this is the doing of District 3 and their master chemist Gilbert Lewis. In order to ensure that you can use this trick to kill District 3, complete the assessment...