Pure thulium is never found in nature, but it is found in small amounts in minerals along with other rare earths. It is mostly taken from monazite found in ores in China, Brazil, India, Sri Lanki, the United States and Australia.
Thulium is silvery-grey and can be cut by a knife. It is a lenthanide element and is the least abundant of the rare earths. It is the second-rarest lenthanide element. Thulium is resistant to corrosion, and it is a good conductor of electricity. Because the element is so rare and expensive, it has few commercial uses outside of chemical research.Learn More
Sulfur is an element with 16 neutrons. Sulfur also has 16 protons and 16 electrons. This results in an atomic number of 16 and an atomic mass of 32.Full Answer >
Methyl butanoate, also known as methyl butyrate, has a chemical formula of C5H10O2. Methyl butanoate is the methyl ester of butyric acid and is present in some plant products, including pineapple oil. It is also manufactured for use in the perfume industry and as a food flavoring.Full Answer >
On the periodic table, the seven horizontal rows are called periods. On the left-hand side of the periodic table, the row numbers are given as one through seven. Moving across a period from left to right, the atomic number of the elements increases.Full Answer >
Positively charged atomic particles are called protons. These particles, along with neutrons, exist in the nucleus of the atom. Protons and neutrons each have an atomic mass of one.Full Answer >