TOLONG KAK , MOHON BANTUANNYA​

Jawaban:

C. Neutron-Neutron

Penjelasan:

Dimana didapat dari, Neutron = Nomor Massa – Nomor Atom

1. 23-11 = 12 N, 24-12 = 12 N , (Isoton)

2. 18-8 = 10 N, 19-9 = 10 N , (Isoton)