In Lesson 2, you were introduced to the two types of chemical bonds: ionic and covalent. In this lesson, you will dive deeper into the ionic compounds. You will quickly realize that ionic compounds are everywhere: they are found in foods, beverages, medications, and household products and play an important role in your health. As you will learn, some ions are good for you while others can be hazardous to your health. You will continue to use the periodic table to guide your understanding of ionic bonds, but you will also being learning about some bonds that don’t follow some of the rules you have learned about so far. Moreover, you will start to explore some more complex bonds in which compounds form in different ratios to help fulfill the octet rule. You will also learn some naming conventions for ionic compounds, which will be very helpful as you explore the world of this diverse group of compounds.
Countries: US
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Molecules: When Atoms Share Electrons
While covalent compounds, also called molecular compounds, only consist of the 16 nonmetals you see on the right side of the periodic table, they make up the most diverse and flexible types of interactions. You first learned about molecular compounds along with ionic compounds in Lesson 3. In that same lesson, you learned more about the ionic bonds that develop when electrons are transferred between elements. Now in Lesson 4, you will focus on molecular bonds and the compounds they form. You will learn the role that shape plays in determining the chemical and physically properties of molecules and the compounds they form, why they are so flexible in their interactions, and how we are striving to manipulate the properties of these compounds to improve our lives-both inside and outside our bodies.
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Organic Molecules
This lesson provides a wonderful introduction to why organic compounds play such an integral role in our bodies and the world around us. You will learn how to identify organic compounds, the role carbon plays in the amazing diversity of organic compounds, as well as further emphasis on why shape matters so much in chemistry.
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Chemical Reactions: Atoms Find New Partners
The presence of ongoing change is a reality we cannot escape, but most change is related to chemistry and takes place at a level you can’t see. This lesson explores three key topics: How to identify whether a chemical or physical change has occurred. How to classify chemical reactions into categories to help predict the outcome. How to calculate substances to ensure the necessary amounts of the ingredients are used and the desired amount of material is created.
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Understanding Chemistry in Our World Box Set (14 Lessons on 2 DVDs)
Understanding Chemistry in Our World is a one-semester introductory course that speaks to the beginning student as well as those who have previous knowledge. This course takes students on a journey of experimentation and investigation. The concepts they learn will guide them to identify chemistry at work in everyday situations, and hopefully inspire them to explore new topics outside of the classroom setting.
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Chemistry and the Amazing Table
The more you know about chemistry the more you will be able to predict, control and manipulate the world around you. Since human kind learned to control fire, we have yearned to understand why the world behaves the way it does. Chemistry is often referred to as the “central science,” because of its pivotal role in the study of all other sciences.
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Bonding: Atomic Glue
Lesson 2 is a crucial lesson because it takes you from discussing the elements in isolation to exploring how these elements interact with each other at the atomic level, and how chemists, including you, can predict these interactions. As you were introduced, or most likely reintroduced, to the elements in the periodic table, you learned the important role protons play in defining one element from the next. As we move our focus to bonding in this lesson you will shift your focus to the electrons, since they define how elements interact with each other.
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Bootstrap Methods & Permutation Tests
In this lesson, you’ll learn what statisticians do when they need to analyze data that does not meet the strict requirements for the tests covered so far in this course. In our previous lessons, the tests have required Normal distributions and proper sample sizes. But sometimes these conditions simply cannot be met. For instance, some investigations involve collecting data on human subjects with serious illnesses where it would be simply impossible or unethical to keep sampling in order to meet all the criteria for traditional statistical analysis. Other times, the sample sizes are limited due to expense or the availability of subjects to study. Rather than simply discard the data or abandon the study, statisticians have gotten around the problem by using the power of computers to simulate the necessary conditions in a way enables them to make reliable estimates and draw valid conclusions. While these methods make for a far more complex analysis, they allow researchers to investigate important data sets they could not have otherwise analyzed.
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Nonparametric Tests
So far, all of the tests introduced in this course have required that the data have a Normal distribution. However, what about those studies in which the distribution is not Normal? Most of the tests studied thus far are robust with regard to Normality, and can be used as long as the sample size is large enough. However, there are times when a study has a small sample size that does not take a Normal distribution. What happens then?
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Statistical Process Control
Throughout this course, you’ve seen many real world examples of how statistics is applied when researchers want to gain new information. In this lesson, you’ll see how the statistical procedures you’ve learned are applied to business and manufacturing processes. While you will not be learning any new tests of significance in this lesson, it does apply what you have learned about descriptive statistics to events in the workplace.