<span> E = h v where v = frequency h = plancks constant 6.626 * 10 - 34
4.8 * 6.626 = 31.8 </span>
CrF3; Cr has a 3+ charge and F has a 1-.
might be gas change or colour change
That is false because every type of plastic can biodegrade
<span>Chemical change.........................................................................</span>
