Lithium, sodium, and potassium have many applications, while rubidium and caesium are very useful in academic contexts but do not have many applications yet.
lˈɪθiəm, sˈoʊdiəm, ænd pətˈæsiəm hæv mˈɛni ˌæplɪkˈeɪʃənz, wˌaɪl ɹuːbˈɪdiəm ænd sˈiːsiəm ɑːɹ vˈɛɹi jˈuːsfəl ɪn ˌækədˈɛmɪk kˈɑːntɛksts bˌʌt duːnˌɑːt hæv mˈɛni ˌæplɪkˈeɪʃənz jˈɛt.