Answer:
The elements in Group 2 (beryllium, magnesium, calcium, strontium, barium, and radium) are called the alkaline earth metals (see Figure below). These elements have two valence electrons, both of which reside in the outermost s sublevel. The general electron configuration of all alkaline earth metals is ns
Answer:
Explanation:
Each half life period reduced the amount of substance by half
So 6 of half life cycles or decays will go.
I am very sure that the answer is C. Hope it’s right :)
I think is the letter B but i dont know if its right
