Answer:
Red, orange, yellow, green, blue, indigo, violet.
Explanation:
The most brittle one is selenium!
You should do it often. There you go.
Answer:
76
Explanation:
128 is the mass number. it means protons+nutrons=128
then the atomic number of te-128 is 52. atomic number means the number of protons .
so 128-52=76.
if you don't get it, I'll explain it later