Problem

Which of the following nuclei lie within the band…

View

Problem 9 Medium Difficulty

Which of the following nuclei lie within the band of stability shown in Figure 21.2$?$
(a) chlorine-37
(b) calcium- 40
(c) 204 $\mathrm{Bi}$
(d) 56 $\mathrm{Fe}$
(e) $^{206} \mathrm{Pe}$
(f) $^{211} \mathrm{P} \mathrm{b}$
(g) 222 $\mathrm{Rn}$
(h) carbon-14

Answer

a) stable
b) stable
c) stable
d) stable
e) stable
f) not stable
g) not stable
h) not stable

Related Courses

Chemistry 102

Discussion

You must be signed in to discuss.

Top Chemistry 102 Educators

Watch More Solved Questions in Chapter 21

Problem 1

Problem 2

Problem 3

Problem 4

Problem 5

Problem 6

Problem 7

Problem 8

Problem 9

Problem 10

Problem 11

Problem 12

Problem 13

Problem 14

Problem 15

Problem 16

Problem 17

Problem 18

Problem 19

Problem 20

Problem 21

Problem 22

Problem 23

Problem 24

Problem 25

Problem 26

Problem 27

Problem 28

Problem 29

Problem 30

Problem 31

Problem 32

Problem 33

Problem 34

Problem 35

Problem 36

Problem 37

Problem 38

Problem 39

Problem 40

Problem 41

Problem 42

Problem 43

Problem 44

Problem 45

Problem 46

Problem 47

Problem 48

Problem 49

Problem 50

Problem 51

Problem 52

Problem 53

Problem 54

Problem 55

Problem 56

Problem 57

Problem 58

Problem 59

Problem 60

Problem 61

Problem 62

Video Transcript

one says Ricky. And today we're working on a problem. Nine. So we're given eight different isotopes, and we have to determine whether they are stable based on this, uh, or whether they lie within the band of stability. Um, and this is a figure 21.2 in your textbook. So just keep in mind that blue is stable. Green is radioactive. And also all isotopes of elements with atomic numbers greater than 83 are unstable. All right, so And so the way that we can read this graph is by, um, just calculating the ratio of neutrons, two protons, and the closer it is to essentially one, um, the more stable. All right. So first we have chlorine 17 and chlorine 17 as a 20 neutrons and 17 protons. This is a ratio that is about one so stable. Next, we have calcium. 40 calcium. 40 has an atomic number of 20 and 20 prote man 20 neutrons. This is also another stable isotope because as a 1 to 1 ratio protons and neutrons business, it is atomic number of 83. I'm in this case, it has an atomic mass, It to a four. That means the ratio of of some neutrons protons is about 1.5. This will make this stable, although it's nearing instability. Oh, Iron has an atomic number of 26 in a in a mass of 56. It has a ratio off about one, so we know that this is also stable. Next, we have led 82. There are 124 neutrons, 82 protons. This is about a ratio of 1.5. So meaning let 82 a stable. Next, we have led to 11. Oh, sorry. I was saying, let 85 men led to a six. Now we're on lead to 11. Um, in this case, there are under 29 neutrons and 82 protons. This is a ratio of about 1.6. So led to 11. It's unstable. John has an atomic number of 86 which is greater than 83. So unstable. Um, carbon 14 as eight neutrons, six protons. The ratio. If we look at our graph, we'll see that the ratio or will The ratio is 1.33 and we see that carbon 14. It's stable. I hope this video was helpful. Now I'll see you in the next one

We have video lessons for 98.09% of the questions in this textbook