They form various types of oxides, such as simple oxides (containing the O2− ion), peroxides (containing the  ion, where there is a single bond between the two oxygen atoms), superoxides (containing the  ion), and many others.
ðeɪ fˈɔːɹm vˈɛɹiəs tˈaɪps ʌv ˈɑːksaɪdz, sˈʌtʃ ɐz sˈɪmpəl ˈɑːksaɪdz kəntˈeɪnɪŋ ðɪ ˈoʊ tˈuː mˈaɪnəs ˈaɪɑːn, pəɹˈɑːksaɪdz kəntˈeɪnɪŋ ðɪ ˈaɪɑːn, wˌɛɹ ðɛɹ ɪz ɐ sˈɪŋɡəl bˈɑːnd bᵻtwˌiːn ðə tˈuː ˈɑːksɪdʒən ˈæɾəmz, sˌuːpɚɹˈɑːksaɪdz kəntˈeɪnɪŋ ðɪ ˈaɪɑːn, ænd mˈɛni ˈʌðɚz.