Answer:
decrease i had the same question in 8th grade u must be in ninth
Explanation:
ohh im not sure but i think its A
B the atmosphere
D. gasoline
C. a carbonated soft drink (without bubbles)
C, Movement
Mg-19:
#protons = 12
#neutrons = 7
#electrons = 12
Mg-40:
#neutrons = 28