Respuesta :

ashanidani
[He] 2s2 2p3
this would be the answer, so i’m going to infer from the choices that it is [He]
ichigokurosaki69

Answer:

B) He

Step-by-step explanation:

This ion has gained 3 valence electrons, meaning it is a full octet or all 8 valence electrons in its outer most shell

The only atom there that is a noble gas or full octet is He or Helium