Question

determine the number of protons, neutrons and electrons in potassium 19 k 39.098 p⁺__ n° e⁻__

Explanation:

Step1: Determine number of protons

The atomic number is 19, so number of protons $p^{+}=19$.

Step2: Determine number of neutrons

Atomic mass is approximately 39.098. Rounding to 39. Neutrons $n^{0}=39 - 19=20$.

Step3: Determine number of electrons

For a neutral atom, number of electrons equals number of protons. So $e^{-}=19$.

Answer:

$p^{+}:19$, $n^{0}:20$, $e^{-}:19$