Question

calculati masa pentru:
a)7 atomi P (Z=15,A=31)
b)100 atomi U (Z=99,A=235)​

Answer 1

1 atom P ---------- 31 g

7 atomi P -------- x g

x=7*31=217g

1 atom U ---------- 235 g

100 atomi U------ y g

y=100*235=23500  g