Question

Give the proper isotopic symbols for:

a. The isotope of fluorine with mass number 19.

b. An isotope of gold with 118 neutrons.

c. An isotope of mass number 105 with 58 neutrons.

Provide the isotopic symbols for the following isotopes:

a. The isotope of fluorine with mass number 19.

b. An isotope of gold with 118 neutrons.

c. An isotope of mass number 105 with 58 neutrons.

Answer 1

The isotopic symbols for the given isotopes are: 19F for fluorine, 197Au for gold, and 105Ag for the isotope with a mass number 105 and 58 neutrons.

Step-by-step explanation:

To write the isotopic symbols for the given isotopes, we'll include both the atomic number (number of protons) and the mass number (sum of protons and neutrons).

• The isotope of fluorine with mass number 19: Fluorine has an atomic number of 9, so its symbol is 19F.
• An isotope of gold with 118 neutrons: Gold has an atomic number of 79, so its mass number is 118 + 79 = 197. Its symbol is 197Au.
• An isotope of mass number 105 with 58 neutrons: The atomic number is obtained by subtracting the number of neutrons from the mass number (105 - 58 = 47). The atomic number 47 corresponds to silver (Ag), so the symbol is 105Ag.