Homework Answers
14. b and c are true (which means d is true)
16. c is true
26. Nuclear density: 3.34 x 10-24 g/(4/3)p(0.5*10-13)3 = 6.38 * 1015 g/cm3
Atomic density: 3.34 x 10-24 g/(4/3)p(1.0*10-8)3 = 0.797 g/cm3
Scale model: If the nucleus is 1 mm, then the entire atom will be 105 mm = 100 m. That's like saying that if the nucleus is the width of a straight pin, then the entire atom would be the size of a football field!
33.
| # protons | # neutrons | # electrons | |
| a. | 12 | 12 | 12 |
| b. | 12 | 12 | 10 |
| c. | 27 | 32 | 25 |
| d. | 27 | 32 | 24 |
| e. | 27 | 32 | 27 |
| f. | 34 | 45 | 34 |
| g. | 34 | 45 | 36 |
| h. | 28 | 35 | 28 |
| i. | 28 | 31 | 26 |