 
<translate> Tambayar ita ce: Kowane harsashi na iya ƙunsar adadin electrons kawai: Harsashi na farko na iya riƙe har zuwa electrons biyu, harsashi na biyu na iya riƙe har zuwa takwas (2 + 6) electrons, harsashi na uku na iya riƙe har zuwa 18 (2 + 6 + 10) da sauransu. Tsarin da aka saba da shi shi ne cewa harsashi na nth zai iya riƙe har zuwa 2 (n) electrons. Tun da yake ana jan hankalin electrons zuwa kwayar, electrons na atom za su mamaye shells na waje kawai idan an riga an cika shells na ciki da sauran electrons. Koyaya, wannan ba tsayayyen buƙata bane: atoms na iya samun biyu ko ma uku ba cikakkun harsashi na waje ba. (Duba dokar Madelung don ƙarin cikakkun bayanai.) Don bayani game da dalilin da yasa ake samun electrons a cikin waɗannan shells duba tsarin lantarki.  Amsa wannan tambaya: nawa ne iyakar adadin electrons a cikin farko makamashi harsashi na wani atom? Gudun hankali: Muhimmin bangare don amsa wannan tambayar shine: Kowane harsashi na iya ƙunsar adadin electrons kawai: Harsashi na farko na iya riƙe har zuwa electrons biyu, harsashi na biyu na iya riƙe har zuwa takwas (2 + 6) electrons, harsashi na uku na iya riƙe har zuwa 18 (2 + 6 + 10) da sauransu. <eng> The question is: Each shell can contain only a fixed number of electrons: The first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on. The general formula is that the nth shell can in principle hold up to 2 (n) electrons. Since electrons are electrically attracted to the nucleus, an atom's electrons will generally occupy outer shells only if the more inner shells have already been completely filled by other electrons. However, this is not a strict requirement: atoms may have two or even three incomplete outer shells. (See Madelung rule for more details.) For an explanation of why electrons exist in these shells see electron configuration.

Answer this question: what is the maximum number of electrons in the first energy shell of an atom?
Stream of consciousness: The important part for answering this question is: Each shell can contain only a fixed number of electrons: The first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on.
 