It seems that you have not added the necessary options for us to answer this question so I had to look for it. But anyway, here is the answer. The characteristic that is NOT used <span>to categorize different types of landforms is this: a natural physical feature of the Earth's surface. Hope this answer helps.</span>
The complex CoCl2(en)2 is named as DICHLOROBIS (ETHYLENE DIAMINE) COBALT(II) CHLORIDE.
Here the oxidation number of Cobalt metal is +3. It is a complex compound with no charge on ethylene diamine as it is neutral. The charge on the whole compound is +1.
B as the glass just changes form as it shattered but the chemical composition is same as it was before
Atomic number Carbon = 6
14 mass - 6 protons = 8 neutrons
mass (protons+neutrons) - atomic number (protons #) = neutrons #