If you cut the cube and keep all the pieces you are causing only physical change
D.) There must be an equal number of atoms of each element on both sides of the equation
Answer:

Explanation:
Alkaline earth metals are in group 2. The number of valence electrons of elements in group 2 is 2.
Answer: plants and animal cells
Explanation:
It is going to be reaction of neutralization, and water and salt will be formed. If acid and base are strong, the reaction of the solution should become neutral.