An effect of the instability of an odd number of either type of nucleons is that odd-numbered elements, such as the alkali metals, tend to have fewer stable isotopes than even-numbered elements.
ɐn ɪfˈɛkt ʌvðɪ ɪnstəbˈɪlᵻɾi əvən ˈɑːd nˈʌmbɚɹ ʌv ˈiːðɚ tˈaɪp ʌv nˈuːklɪənz ɪz ðæt ˈɑːdnˈʌmbɚd ˈɛlɪmənts, sˈʌtʃ ɐz ðɪ ˈælkəlˌaɪ mˈɛɾəlz, tˈɛnd tə hæv fjˈuːɚ stˈeɪbəl ˈaɪsətˌoʊps ðɐn ˈiːvənnˈʌmbɚd ˈɛlɪmənts.