Answer:
Any Alkali Earth Metal - Group 2A aka Group 16 or polyatomic cation with a 2+ charge
22 because that how many days it will take for the exact moon shape to pass and it will then reappear.
Answer:
Sulfur
Explanation:
Sulfur has 16 valence electrons, as shown in the diagram.
I had this same question on one of are worksheets is D I can’t really explain it but the answer is D
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.
