Sodium and potassium are very abundant in earth, both being among the ten most common elements in Earth's crust; sodium makes up approximately 2.6% of the Earth's crust measured by weight, making it the sixth most abundant element overall and the most abundant alkali metal.
sˈoʊdiəm ænd pətˈæsiəm ɑːɹ vˈɛɹi ɐbˈʌndənt ɪn ˈɜːθ, bˈoʊθ bˌiːɪŋ ɐmˌʌŋ ðə tˈɛn mˈoʊst kˈɑːmən ˈɛlɪmənts ɪn ˈɜːθz kɹˈʌst; sˈoʊdiəm mˌeɪks ˌʌp ɐpɹˈɑːksɪmətli tˈuː.sˈɪks pɚsˈɛnt ʌvðɪ ˈɜːθz kɹˈʌst mˈɛʒɚd baɪ wˈeɪt, mˌeɪkɪŋ ɪt ðə sˈɪksθ mˈoʊst ɐbˈʌndənt ˈɛlɪmənt ˌoʊvɚɹˈɔːl ænd ðə mˈoʊst ɐbˈʌndənt ˈælkəlˌaɪ mˈɛɾəl.