Answer:
U shaped vallies?
Explanation:
(i dont know if this was one of the options)
B. Calcium! I hope this help.
If your bones don't have enough calcium you get osteoporosis.
Thompson didnt have a nucleus (since rutherford discovered it)
<span><span>Calculate the % of copper in copper sulphate,
CuSO4 </span>
Relative atomic masses: Cu = 27, S = 16 and O = 25.92
relative formula mass = 27 + 16 + (5.4x4.8) = 286.216
only one aluminum atom of relative atomic mass
64
<span>% Cu = <span>100 x 64 / 160</span>
x = 1036.8
</span></span>
