Ionic Bonding Mini-Lab and Lesson

Ionic Bonding Lesson!

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Wed 9/12/12

Ionic Bonding with Table Salt

Ionic Bonding Lesson!

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Wed 9/12/12

Discovery Lab with Salt!

Do First: How many Valence Electrons are in Chlorine? __________ Reading: Table Salt is made from the chemical bonding of Sodium and Chlorine. Remember, reactivity is the nature of how elements will react to other elements. Also, reactivity is determined by how many valence electrons are in an element’s outermost shell. Table salt is a chemical reaction because the element Sodium is a soft, shiny, explosive metal while Chlorine is a green, poisonous gas.

When chemically combined, it produces sodium chloride, also known as table salt.

The reason why Sodium can combine with Chlorine is because of its valence electrons number equals ____.

Below: Draw a Bohr Model of Sodium

Draw a Bohr Model of Chlorine

Remember, for an element to be stable, it must have _____ valence electrons, or a full electron shell. Sodium has ___ valence electron, whereas, Chlorine has ____ valence electrons. If two elements combine to form a total of 8 valence electrons, the compound can be stable!

Readings part 2-- Sodium is the vital component in the human diet for the correct regulation of cells and nerves in the human body. Extra sodium is needed during excessive perspiration As it is regularly

Ionic Bonding Lesson!

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Wed 9/12/12

excreted through urine, it does not pose life threatening risks. Deficiency Symptoms: Recommended intake value of sodium is 120mg/day. But its deficiency (lack) can be harmful, as it directly attacks the nervous system of human body. In general, it leads to o

Diarrhea

o

Weakness

o

Weight loss

o

Vomiting

o

Low blood pressure

o

Confusion

o

Headache

o

Lethargy

o

Dizziness

Overdose of sodium causes high blood pressure and swelling of brain nerves and goiter (swelling of the neck.) If it worsens, it can even lead to coma.

Reduction in the amount of sodium also reduces the fat accumulated in the periphery. It also elevates the chances of lung infection. Sodium present in plasma provides ninety percent base to the body. Depletion of sodium layer is an invitation to diseases that can cause exhaustion, exertion and mental apathy.

Important Sources: Some of the important sources of sodium are apple, common salt, homemade soups, cabbage, egg yolks, pulses, bananas. Even, carrot, baking powder and baking soda, turnips, leafy vegetables, and dried peas are some of the essential sources. Processed cheese, smoked fish and salty meats, snacks, pickles and sauce contains ample amount of sodium.

Experiment Lab:

1. Each student must have a foam cup. Put your first and last name on it.

2. Fill cup Âź with unknown liquid.

3. Safely smell (waft) cup. Record all observations.

4. Take a small sip and swallow. (Be safe!) Record observations.

5. Take a slightly bigger sip and HOLD in your mouth. Swig contents in your mouth for 10 seconds. Spit out back in cup. Record observations.

6. Dispose liquid in sink. Dispose cup in trash bin.

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3.

4.

5.

Observations

Ionic Bonding Lesson!

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Wed 9/12/12

7. Draw 2 Bohr models, one of Sodium and one of Chlorine on loose-leaf. Connect the outer shells of Sodium to Chlorine! How many valence electrons are there combined? __ What does this say about the compound? ________________________ Exit Ticket: On loose-leaf draw an ionic bond between Beryllium and Oxygen.

Exit Ticket #2: A great definition for an Ionic Bond is the __________of two elements chemically so that their valence electrons equal ______, making the bond a stable compound.