Question

part b: write the nuclear symbol (11 - 15) write the full nuclear symbol for each description. 11. element with 15 protons and 16 neutrons 12. element with 19 protons and 20 neutrons 13. element with 82 protons and 125 neutrons 14. element with 6 protons and 6 neutrons 15. element with 92 protons and 143 neutrons

Explanation:

Step1: Recall nuclear - symbol format

The nuclear symbol is written as $_Z^A X$, where $Z$ is the atomic number (number of protons), $A$ is the mass number (number of protons + neutrons), and $X$ is the chemical symbol of the element.

Step2: Identify element for 11

The element with 15 protons is phosphorus (P). The mass number $A=15 + 16=31$. The nuclear symbol is $_{15}^{31}P$.

Step3: Identify element for 12

The element with 19 protons is potassium (K). The mass number $A = 19+20 = 39$. The nuclear symbol is $_{19}^{39}K$.

Step4: Identify element for 13

The element with 82 protons is lead (Pb). The mass number $A=82 + 125=207$. The nuclear symbol is $_{82}^{207}Pb$.

Step5: Identify element for 14

The element with 6 protons is carbon (C). The mass number $A=6 + 6=12$. The nuclear symbol is $_{6}^{12}C$.

Step6: Identify element for 15

The element with 92 protons is uranium (U). The mass number $A=92+143 = 235$. The nuclear symbol is $_{92}^{235}U$.

Answer:

1. $_{15}^{31}P$
2. $_{19}^{39}K$
3. $_{82}^{207}Pb$
4. $_{6}^{12}C$
5. $_{92}^{235}U$