Chemical Bonding

• Electrons are the currency of the chemical world

Ionic Bonds•What is an Ionic Bond?

- An Ionic Bond is a chemical bond resulting from the TRANSFER of electrons from one bonding atom to another

• When is an ionic bond formed?

- An ionic bond is formed when a cation (positive ion) transfers electrons to an anion (negative ion).

Ionic Bonds: One Big Greedy Thief Dog!

1). Ionic bond – electron from Na is transferred to Cl, this causes a charge imbalance in each atom. The Na becomes (Na+) and the Cl becomes (Cl-), charged particles or ions.

What are some characteristics of an ionic bond?

1. Crystalline at room temperatures

2. Have higher melting points and boiling points compared to covalent compounds

3. Conduct electrical current in molten or solution state but not in the solid state

4. Polar bonds

Covalent Bonds•What is an Covalent Bond?

- A covalent bond is a chemical bond resulting from SHARING of electrons between 2 bonding atoms.

• What forms a covalent bond?

- A covalent bond is formed between two nonmetals.

What are some characteristics of a covalent bond?

1. Covalent bonds have definite and predicable shapes.

2. Very strong

3. Low melting and boiling points

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First, we are going to look at Polar Covalent…

What is polar covalent?

-Polar covalent is a description of a bond that has an uneven distribution of charge due to an unequal sharing of bonding electrons.

The boy is not equally sharing with anyone else but rather taking all the food for himself.

Next, we are going to look at Non-Polar Covalent…

What is non-polar covalent?-Non polar covalent is a covalent bond that has an even distribution of charge due to an equal sharing of bonding electrons.

This couple is non- polar because they are sharing the drink equally between them.

- water is a polar molecule because oxygen is more electronegative than hydrogen, and therefore electrons are pulled closer to oxygen.

Polyatomic Bonds

What is a Polyatomic Bond?

- A polyatomic bond is charged group of covalently bonded atoms. It is made up of more than one atom.

Polyatomic ions usually have a charge because the collection of atoms has either gained an extra electron or else it has lost an electron.

Just as a summary to what each bond looks like…