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Weekly net Work #6:
Ions and Ionic Compounds
This assignment was due by noon ~ above Tuesday, February 18, 2003.
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The function of this week"s assignment is to predict ion charges and also to start to create chemical formulas for ionic compounds.
The electron configurations of the noble gases are incredibly stable. As soon as an atom experience a chemical adjust to come to be an ion, the atom will gain or shed electrons till it is isoelectronic (has the exact same electron configuration) through the nearest noble gas. Steels tend to lose electrons and kind positively charged ions referred to as cations. Non-metals have tendency to obtain electrons and type negatively charged ions called anions.
For example, salt metal, Na,
Ionic compounds space composed of metal cation(s) and non-metal anion(s) and also have a net fee of zero. Salt chloride, NaCl, is composed of Na+ and also Cl– in a one come one ratio which provides the formula zero charge. When writing the formula for an ionic compound, the symbol for the cation is composed first.
Note that creating ions native neutral atoms is a chemistry reaction. Click here to watch sodium metal and also chlorine gas reacting to form sodium chloride. This video clip clip is indigenous the McMurry textbook companion internet site (http://cwx.prenhall.com/bookbind/pubbooks/mcmurrygob/). If you can"t check out the reaction, there is a picture of the on web page 74 in her text.
The adhering to questions room designed to aid you start to think about ions and also ionic compounds. You may wish come look at thing 4 section 7 (page 79-81) and also section 10 (bottom of web page 84-87) in her textbook.1.
|Predict the formula the the compound created when lithium and fluorine react. (Remember, elements in the same group react similarly.)|
|2.||Predict the formula of the compound created when potassium and iodine react.|
|3.||What ion will magnesium form?|
|4.||What ion will certainly oxygen form?|
|5.||What ion will certainly aluminum form?|
When creating the formula for ionic compounds, the full positive charge from the cations add to the total an adverse charge native the anions must add up to zero because that the formula to have a zero network charge. As soon as writing formulas for an alkali metal reacting v a halogen, the proportion of ion is one to one. Remember our example of NaCl above? NaCl is composed of Na+ and Cl– ions. So 1(1+) + 1(1-) = 0
What around the compound that creates when calcium reacts with bromine? Calcium creates the 2+ ion, Ca2+, due to the fact that it demands to shed 2 electrons to be isoelectronic v argon. Bromine develops the 1- ion, Br–. The formula because that calcium bromide is CaBr2. You need two bromide ion to balance the 2+ charge of the calcium ion so the the formula will have no charge. 1(2+) + 2(1-) = 0
|6.||Predict the formula of the compound formed when aluminum and also chlorine react.|
|7.||Explain the thought procedure you provided to number out the formula because that aluminum chloride in inquiry 6.|
|8.||Predict the formula for the compound developed when potassium and oxygen react.|
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|Explain the thought procedure you supplied to figure out the formula for potassium oxide in inquiry 8.|
You can edit your responses till you room satisfied with your answers. Remember, the function of the assignment is to assist you think about a topic. Her answers don"t need to be "right" to get credit, you just need come answer the inquiries with your ideal effort.
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