Αποτελέσματα Αναζήτησης
In the chapters that follow, we will focus on the concepts of chemistry that are necessary for understanding life and apply these concepts to understanding how living things work. We begin with an explanation of why and how atoms bond together to form molecules.
Experimental evidence revealed the formula, C60, and then scientists determined how 60 carbon atoms could form one symmetric, stable molecule. They were guided by bonding theory—the topic of this chapter—which explains how individual atoms connect to form more complex structures.
The Lewis Theory: Valence electrons, or the electrons in the outermost electron shell, have an essential role in chemical bonding. Ionic bonds are formed between atoms when electrons are transferred from one atom to another. Ionic bond is a bond between nonmetals and metals .
• Structural formulas: CH 4 (methane), C 2H 6 (ethane), and C 4H 10 (normal butane) • Saturated C nH 2n+2 - strong bonds inside molecule, weak between molecules • Unsaturated C nH 2n, C nH 2n-2 - generally more reactive
Draw the organic structures using line notation given the names below; these chemicals include the functional groups: alcohols, ethers, aldehydes, ketones, carboxylic acids, and esters. a. 3,3,4-trimethyl-2-pentanol b. dimethylether c. 2,4,6-trichloro-3-hexanol
Differentiated, editable worksheets providing a wide range of assessment questions exploring hydrocarbons, including structural formulae, writing word equations and balancing symbol equations. These write-on worksheets will ask learners to use their knowledge of hydrocarbons in an applied context.
Structural Chemistry Numerous important solid-state structures can be described by eutactic (close packed) arrangements of atoms with other atoms occupying the void spaces. However, this description is a purely geometrical perspective of structure and provides no clear rationales based on the
