Q. How much is lutetium worth?
Pure lutetium metal is very difficult to prepare. It is one of the rarest and most expensive of the rare earth metals with the price about US$10,000 per kilogram, or about one-fourth that of gold.
Q. Does scandium have a positive or negative charge?
Well, a neutral atom will have equal numbers of protons, which are positively charged particles located in the nucleus, and electrons, which are negatively charged particles that surround the nucleus. This means that a neutral scandium atom has 21 protons in its nucleus.
Table of Contents
- Q. How much is lutetium worth?
- Q. Does scandium have a positive or negative charge?
- Q. Is se a metal or nonmetal?
- Q. Which property does not exist in metals?
- Q. Which property is true for metals?
- Q. Are metals shiny?
- Q. What happens when metals are burnt in air?
- Q. Why do metals not burn?
- Q. What metals will burn?
Q. Is se a metal or nonmetal?
Selenium is a chemical element with the symbol Se and atomic number 34. It is a nonmetal (more rarely considered a metalloid) with properties that are intermediate between the elements above and below in the periodic table, sulfur and tellurium, and also has similarities to arsenic.
Q. Which property does not exist in metals?
Which of the following property is generally not shown by metals? Explanation: Metals have shiny appearance and not dull. Thus property of dullness is not shown by metals.
Q. Which property is true for metals?
If they tried this with nonmetals, the material would shatter! Most metals are also ductile, which means they can be drawn out to make wire. Conductivity: Metals are excellent conductors of electricity and heat. Because they are also ductile, they are ideal for electrical wiring.
Q. Are metals shiny?
Metals Have Luster Electrons move around the nucleus in groups called clouds. Light reflects, or bounces off, these outer electrons. This makes the metal appear shiny. This shiny appearance on the surface of some metals is called luster.
Q. What happens when metals are burnt in air?
Metals, on being burnt in air, react with the oxygen to form metal oxides.
Q. Why do metals not burn?
In summary, because most atoms in a solid chunk of metal don’t have access to oxygen atoms, because metals have a high ignition temperature, and because metals are good thermal conductors, they don’t burn very well in everyday situations.
Q. What metals will burn?
Several metals, including lithium, sodium and magnesium, can burn easily, and from time to time large amounts catch fire in factories. But even heaps of burning metal need not cause immediate panic. They don’t blow up; instead they tend to build up ash that chokes off their oxygen supply, so they slowly burn out.
