21 Jun, 2012 Who discovered 0. Niobium is a soft gray metal and a chemical element represented by the symbol Nb with the atomic number 41. The free metal does not occur in nature, but it can be found in certain minerals such as columbite and pyrochlore. The largest deposits of niobium containing minerals are found in Brazil and Canada and these two countries continue to produce the majority of the element for the world. Niobium is chemically similar to the element tantalum, which meant that its discovery was the subject of much debate.
Roses - anywhere from 5 petals to 110 petals depending on the variety. Chrysanthemums - same thing. Depends on type 20-30 up to 100 or so. Forms of mums: Incurved â ray florets tend to turn upward and inward. 1  Reflexed â ray florets turn outward and downward from the center of the flower.  Anemone-Centered â having a prominent center of disk florets which can be described as having a central âpincushionâ effect.
Answer Wiki. There needs to be a bit of rose history learned to get at the true story. Garden roses can be generally divided into three main groups â Species, Old Garden Roses, and Modern Roses. Among the Species, some are very fragrant, some are moderately fragrant, some are not fragrant at all, and a handful actually smell odd or âunpleasantâ.