Calculate the number of proton, neutrons and electrons in `._(19)^(39) K` .

Explanation

To calculate the number of protons, neutrons, and electrons in the potassium isotope represented as \( _{19}^{39}K \), we can follow these steps:

### Step 1: Identify the Atomic Number and Atomic Mass
The atomic number (Z) of potassium (K) is given as 19, and the atomic mass (A) is given as 39.

### Step 2: Determine the Number of Protons
The atomic number (Z) represents the number of protons in an atom. Therefore, for potassium:
- Number of protons = Z = 19
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