The answer is A I hope it was right
Answer:
To the best of my knowledge, it is because of the amount of gamma rays is given off.
Explanation:
While both are isotopes, Potassium 40 gives off fewer gamma rays compared to Cobalt 60. Potassium 40 isn't really harmful to humans, but Cobalt 60 (I believe) is used in chemotherapy.
The answer is B. Temperate.
Answer:
Explanation:
There is only room for eight electrons in the second electron shell, so there can only be eight elements in this period, and no room for another section.
