Question

Write isotopic symbols in the form x-a (example c-13) for each isotope.

A) H-1, He-4, C-12
B) O-16, N-14, F-19
C) Mg-24, S-32, Ar-40
D) Na-23, Cl-35, K-39

Answer 1

Isotopic symbols are written by stating the element's symbol followed by a dash and the mass number of the isotope. Some examples include Al-13, Kr-73, Ir-194 for Aluminum, Krypton, and Iridium respectively, and S-34 for the isotope of Sulfur missing information.

Step-by-step explanation:

The isotopic symbols for each isotope mentioned can be written as follows:

• Al-13 (Aluminum with mass number 13)
• Kr-73 (Krypton with mass number 73)
• Ir-194 (Iridium with mass number 194)
• O-14 (Oxygen-14 with mass number 14)
• Cu-70 (Copper with mass number 70)
• Ta-175 (Tantalum with mass number 175)
• Fr-217 (Francium with mass number 217)

For the isotope with missing information, we can fill in the blank: S-34 (Sulfur with mass number 34). Here we use the atomic number 16 for sulfur from the periodic table.