The alkali metals form complete series of compounds with all usually encountered anions, which well illustrate group trends.
ðɪ ˈælkəlˌaɪ mˈɛɾəlz fˈɔːɹm kəmplˈiːt sˈɪɹiz ʌv kˈɑːmpaʊndz wɪð ˈɔːl jˈuːʒuːəli ɛŋkˈaʊntɚd ˈænaɪənz, wˌɪtʃ wˈɛl ˈɪləstɹˌeɪt ɡɹˈuːp tɹˈɛndz.