Answer:
No.D is the molecules that has trigonal pyramidal sape
I don't know this article, but I do know some major changes: first, the change from the plum pudding model (no nucleus, just electrons) to the gold foil experiment, which had Rutherford shoot alpha particles at a sheet of gold only to find them rebounding, proving the existence of a positively charged mass, i.e a nucleus, in the atom. However, this changed again when Bohr realized that the negatively charged electrons should be attracted to the positively charged center, so that there must be something else inside the nucleus.
Density= mass/volume
= 100/25
density = 4g/ml
Answer:
A cuz a heterogeneous mixture is no uniform
The answer is _Dissolving_.
Hope tis helps
