15 Visual Connection Questions
1 . Figure 2.3 How many neutrons do carbon-12 and carbon-13 have, respectively?
2 . Figure 2.7 An atom may give, take, or share electrons with another atom to achieve a full valence shell, the most stable electron configuration. Looking at this figure, how many electrons do elements in group 1 need to lose in order to achieve a stable electron configuration? How many electrons do elements in groups 14 and 17 need to gain to achieve a stable configuration?
3 . Figure 2.24 Which of the following statements is false?
- Molecules with the formulas CH3CH2COOH and C3H6O2 could be structural isomers.
- Molecules must have a double bond to be cis–trans isomers.
- To be enantiomers, a molecule must have at least three different atoms or groups connected to a central carbon.
- To be enantiomers, a molecule must have at least four different atoms or groups connected to a central carbon.