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The elements we will talk about in this episode have high melting points. One of them is the most refractory metal on Earth. From a chemical point of view, in their pure form, under normal conditions, they are all quite resistant to external factors, such as exposure to air and water. Meanwhile, in nature, they are found exclusively in compounds that are found in small quantities all over the planet. In the periodic table, our heroes are in the sixth group. These are chromium, molybdenum and tungsten. Let's study their properties. #science #chemistry #experiments #experiments