isotope activity\nfor all elements, the number of neutrons can make the nucleus stable or unstable.\ntoo few…

isotope activity\nfor all elements, the number of neutrons can make the nucleus stable or unstable.\ntoo few or too many n⁰ will make a nucleus unstable and the atom will undergo radioactive decay.\nrecall that mass number in the name of an isotope is p⁺ + n⁰.\nmake sure you are checking the periodic table and have the right element.\nstep 1: add p⁺ until you have the right element.\nstep 2: add n⁰ until the isotope mass is correct.\nstep 3: check stability.\nonly answer this for unstable\n1. build lithium - 5. this isotope is stable / unstable . it has too few / too many n⁰.\nbuild lithium - 6. this isotope is stable / unstable . it has too few / too many n⁰.\nbuild lithium - 7. this isotope is stable / unstable . it has too few / too many n⁰.\nbuild lithium - 8. this isotope is stable / unstable . it has too few / too many n⁰.\n2. build oxygen - 14. this isotope is stable / unstable . it has too few / too many n⁰.\nbuild oxygen - 15. this isotope is stable / unstable . it has too few / too many n⁰.\nbuild oxygen - 16. this isotope is stable / unstable . it has too few / too many n⁰.\nbuild oxygen - 17. this isotope is stable / unstable . it has too few / too many n⁰.\nbuild oxygen - 18. this isotope is stable / unstable . it has too few / too many n⁰.\nbuild oxygen - 19. this isotope is stable / unstable . it has too few / too many n⁰.\nanalysis\ncircle any answer that is true. there may be more than 1 correct answer.\nadding this subatomic particle to an atom changes the mass. p⁺ n⁰ e - \nadding this subatomic particle to an atom changes the element. p⁺ n⁰ e - \nadding this subatomic particle to an atom changes the electric charge. p⁺ n⁰ e - \nwith remaining class time, play a few games. see who can get the highest scores.\ngame

isotope activity\nfor all elements, the number of neutrons can make the nucleus stable or unstable.\ntoo few or too many n⁰ will make a nucleus unstable and the atom will undergo radioactive decay.\nrecall that mass number in the name of an isotope is p⁺ + n⁰.\nmake sure you are checking the periodic table and have the right element.\nstep 1: add p⁺ until you have the right element.\nstep 2: add n⁰ until the isotope mass is correct.\nstep 3: check stability.\nonly answer this for unstable\n1. build lithium - 5. this isotope is stable / unstable . it has too few / too many n⁰.\nbuild lithium - 6. this isotope is stable / unstable . it has too few / too many n⁰.\nbuild lithium - 7. this isotope is stable / unstable . it has too few / too many n⁰.\nbuild lithium - 8. this isotope is stable / unstable . it has too few / too many n⁰.\n2. build oxygen - 14. this isotope is stable / unstable . it has too few / too many n⁰.\nbuild oxygen - 15. this isotope is stable / unstable . it has too few / too many n⁰.\nbuild oxygen - 16. this isotope is stable / unstable . it has too few / too many n⁰.\nbuild oxygen - 17. this isotope is stable / unstable . it has too few / too many n⁰.\nbuild oxygen - 18. this isotope is stable / unstable . it has too few / too many n⁰.\nbuild oxygen - 19. this isotope is stable / unstable . it has too few / too many n⁰.\nanalysis\ncircle any answer that is true. there may be more than 1 correct answer.\nadding this subatomic particle to an atom changes the mass. p⁺ n⁰ e - \nadding this subatomic particle to an atom changes the element. p⁺ n⁰ e - \nadding this subatomic particle to an atom changes the electric charge. p⁺ n⁰ e - \nwith remaining class time, play a few games. see who can get the highest scores.\ngame

Answer

Explanation:

Step1: Recall atomic structure facts

Protons ($P^+$) determine element identity, neutrons ($N^0$) contribute to mass, and electrons ($e^-$) determine electric - charge.

Step2: Analyze effect on mass

Adding neutrons ($N^0$) or protons ($P^+$) changes mass as mass number = number of protons+number of neutrons. So adding $P^+$ or $N^0$ changes mass.

Step3: Analyze effect on element

Only adding protons ($P^+$) changes the element as the number of protons defines the element.

Step4: Analyze effect on electric charge

Adding electrons ($e^-$) changes the electric charge. Adding a proton also changes the charge but for neutral atoms adding an electron directly affects the charge.

For the isotope stability part:

Lithium isotopes:

  • Lithium - 5: Unstable, too few $N^0$. Lithium has atomic number (number of $P^+$) = 3. For Li - 5, number of $N^0=5 - 3=2$. Stable lithium isotopes have more neutrons.
  • Lithium - 6: Stable, appropriate number of $N^0$. For Li - 6, number of $N^0 = 6 - 3=3$.
  • Lithium - 7: Stable, appropriate number of $N^0$. For Li - 7, number of $N^0=7 - 3 = 4$.
  • Lithium - 8: Unstable, too many $N^0$. For Li - 8, number of $N^0=8 - 3=5$.

Oxygen isotopes:

  • Oxygen - 14: Unstable, too few $N^0$. Oxygen has atomic number (number of $P^+$)=8. For O - 14, number of $N^0=14 - 8 = 6$.
  • Oxygen - 15: Unstable, too few $N^0$. For O - 15, number of $N^0=15 - 8=7$.
  • Oxygen - 16: Stable, appropriate number of $N^0$. For O - 16, number of $N^0=16 - 8 = 8$.
  • Oxygen - 17: Stable, appropriate number of $N^0$. For O - 17, number of $N^0=17 - 8=9$.
  • Oxygen - 18: Stable, appropriate number of $N^0$. For O - 18, number of $N^0=18 - 8 = 10$.
  • Oxygen - 19: Unstable, too many $N^0$. For O - 19, number of $N^0=19 - 8=11$.

Answer:

  • Lithium - 5: Unstable, too few $N^0$
  • Lithium - 6: Stable
  • Lithium - 7: Stable
  • Lithium - 8: Unstable, too many $N^0$
  • Oxygen - 14: Unstable, too few $N^0$
  • Oxygen - 15: Unstable, too few $N^0$
  • Oxygen - 16: Stable
  • Oxygen - 17: Stable
  • Oxygen - 18: Stable
  • Oxygen - 19: Unstable, too many $N^0$ Analysis:
  • Adding this subatomic particle to an atom changes the mass: $P^+$, $N^0$
  • Adding this subatomic particle to an atom changes the element: $P^+$
  • Adding this subatomic particle to an atom changes the electric charge: $e^-$