An tsara abubuwa cikin tsari mai girma akan tebur na lokaci-lokaci
Amsar ita ce: Lambar atomic ita ce adadin protons a cikin tsakiya na zarra.
Teburin lokaci-lokaci shine alamar alama ta abubuwa, an tsara shi don ƙara lambar atomic. Al'ummar kimiyya sun fara tsara abubuwa ta wannan hanya a cikin 1869 na Dmitri Mendeleev. Ya lura cewa lokacin da aka tsara abubuwan don ƙara adadin atomic, alamu sun bayyana waɗanda ke bayyana yanayin kayansu na lokaci-lokaci. Tun daga wannan lokacin, an karɓi wannan tsari a matsayin babban sashe na sinadarai da kimiyyar lissafi. Ana kuma amfani da oda don ganowa da rarraba abubuwa, da kuma hasashen kaddarorinsu da mu'amalarsu. A yau, tebur na lokaci-lokaci an tsara shi zuwa ƙungiyoyin layuka da ginshiƙai inda kowane jeri ke wakiltar lokaci kuma kowane shafi yana wakiltar rukuni. Wannan tsari yana ba da damar kwatanta sauƙi tsakanin abubuwa kuma yana taimaka wa masana kimiyya su fahimci alaƙar da ke tsakanin su.
