Are non renewable resources produced through biological processes?
Nonrenewable resources, like fossil fuels, were produced through biological processes.
Why does fossil fuel use in the United States make the US vulnerable to the political wishes of foreign countries quizlet?
Why does fossil fuel use in the United States make the U.S. vulnerable to the political wishes of foreign countries? The US imports much of its petroleum from foreign countries which set the prices. Lower demand will prevent large increases in timber prices.
Which of the following will not contribute to resource conservation?
Option C, using nuclear power, is the right answer. But option C (using nuclear power) does not contribute to resource conservation because of the elements used in the production of nuclear energy cannot be recycled.
Which is not a natural resource?
Electricity though produced from natural resources it requires different processes to generate electricity and hence is not a natural resource.
Why people is the most important resource?
Explanation: The Human resource is capable of changing the natural substances to desired valuable resources with the help of skills, cognitive thinking, etc., The knowledge and experience of the human resource combines with the technology, it serves as the best input for many process to produce the desired output.
What is the rarest metal on the planet?
francium
What is the oldest element on Earth?
Phosphorus
Is scandium a rare earth?
Scandium and yttrium are considered rare earth elements since they tend to occur in the same ore deposits as the lanthanides and exhibit similar chemical properties.
Is indium a rare earth?
In nature, indium is quite rare and nearly always found as a trace element in other minerals — particularly in zinc and lead — from which it is typically obtained as a byproduct. Indium has a low melting point for a metal: 313.9 degrees Fahrenheit (156.6 degrees Celsius).
Is Lithium a rare earth?
Although lithium is widely distributed on Earth, it does not naturally occur in elemental form due to its high reactivity. According to the Handbook of Lithium and Natural Calcium, “Lithium is a comparatively rare element, although it is found in many rocks and some brines, but always in very low concentrations.
Why is scandium so expensive?
Owing to its scarcity and limited production, scandium is one of the most expensive of all the natural elements. During the rare earth shortage of 2010, the price for scandium metal soared from a few thousand US dollars to over US$ 15,000 per kilogram.
Does the human body use scandium?
Scandium has no biological role. Only trace amounts reach the food chain, so the average person’s daily intake is less than 0.1 microgram. Scandium can be a threat to the liver when it accumulates in the human body.
How much is scandium worth?
Scandium is a soft, light metal that might have applications in the aerospace industry. With a cost of $270 per gram ($122,500 per pound), scandium is too expensive for widespread use.
What are 3 uses for scandium?
Scandium is used in aluminum-scandium alloys for aerospace industry components and for sports equipment such as bicycle frames, fishing rods, golf iron shafts and baseball bats. Scandium iodide is used in mercury vapor lamps, which are used to replicate sunlight in studios for the film and television industry.
Why do we use scandium?
Scandium is mainly used for research purposes. It has, however, great potential because it has almost as low a density as aluminium and a much higher melting point. An aluminium-scandium alloy has been used in Russian MIG fighter planes, high-end bicycle frames and baseball bats.
Does scandium show +2 oxidation state?
Scandium is a chemical element with the symbol Sc and atomic number 21….
| Scandium | |
|---|---|
| Atomic properties | |
| Oxidation states | 0, +1, +2, +3 (an amphoteric oxide) |
| Electronegativity | Pauling scale: 1.36 |
What is an interesting fact about scandium?
Scandium is considered a rare-earth element because it is often found in rare-earth ores. It also shares many of the same chemical properties of other rare-earths. Scandium is the 35th most abundant element in the Earth’s crust. Scandium is the 23rd most abundant element in the Sun.
Does scandium react with water?
Reaction of scandium with water When finely divided, or heated, scandium metal dissolves in water to form solutions containing the aquated Sc(III) ion together with hydrogen gas, H2.
Why does scandium have 2 valence electrons?
Every element adds one more electron to the outermost shell. Instead of having three electrons in the outer shell, scandium adds its electron to the second to last shell.
Is silicon a metal?
Silicon is neither metal nor non-metal; it’s a metalloid, an element that falls somewhere between the two.