Question

Enter the appropriate symbol for an isotope of potassium-39 corresponding to the isotope notation AZX.

Answer 1

Answer: The atomic symbol of the gibven atom is
`_(19)^(39)\textrm{K}`

Step-by-step explanation:

The general representation of an isotope is given as
`_Z^A\textrm{X}`

where,

Z = atomic number of the atom

A = mass number of the atom

X = symbol of the atom

We are given:

Mass number = 39

Symbol of the atom = K

So, atomic number = 19

Hence, the atomic symbol of the gibven atom is
`_(19)^(39)\textrm{K}`

Answer 2

The notation is actually written in this way (shown in the attached picture). The X is the symbol of the element. So, for potassium, the symbol is K. The A represents the mass number of the isotope. In this case, that would be equal to 39. The Z represents the atomic number of potassium, which is 19. Therefore, the symbol for the isotope is: ³⁹₁₉K