Un frasco de suspensión para la acidez estomacal está compuesto de con una proporción 12.8g hidróxido de magnesio y 11.9 g de hidróxido de aluminio, escribe las fórmulas correspondientes a estos dos compuestos: a)
b)

d.) circle motion requires a force to give it a centripetal acceleration.

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8