Dimensional Complexity essays

Dimensional Complexity essays Dimensional Complexity of the EEG During Divergent and Convergent Thought Processes Creativity is one of the most difficult mental functions to study. While a concrete definition remains illusive, it has been established as a multifaceted phenomenon (Kitto, Lok On the other side of the scale is convergent thinking. Here, very strong mental associations are maintained which upon activation come to a single conclusion that can only be either right or wrong , with a clear connection between the mental representation and the original stimulus (Molle et al., 1999). Thus, two opposite modes of thinking seem to exist, each serving a different function and each having tests that tap into this function. What is of interest, however is the fact that little physical evidence has been collected to support these models. Finding an actual physical correlate for these theories is the purpose if this exploratory research. If creativity exists, then it should have some biological foundation. One way to study this is with the use of the electroencephalogram (EEG). The dimensional comple...

Properties of Ionic and Covalent Compounds

Properties of Ionic and Covalent Compounds If you know the chemical formula of a compound, you can predict whether it contains ionic bonds, covalent bonds, or a mixture of bond types. Nonmetals bond to each other via covalent bonds while oppositely charged ions, such as metals and nonmetals, form ionic bonds. Compounds which contain polyatomic ions may have both ionic and covalent bonds. Identifying Bond Types But, how do you know if a compound is ionic or covalent just by looking at a sample? This is where the properties of ionic and covalent compounds can be useful. Because there are exceptions, you need to look at several properties to determine whether a sample is ionic or covalent, but here are some characteristics to consider: Most crystals are ionic compounds. This is because the ions in these compounds tend to stack into crystal lattices to balance between the attractive forces between opposite ions and the repulsive forces between like ions. Covalent or molecular compounds can exist as crystals, though. Examples include sugar crystals and diamond.Ionic compounds tend to have higher melting and boiling points than covalent compounds.Ionic compounds tend to be hard and brittle while covalent compounds tend to be softer and more flexible.Ionic compounds conduct electricity when dissolved in water while covalent compounds typically dont. This is because covalent compounds dissolve into molecules while ionic compounds dissolve into ions, which can conduct charge.