安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
|
- nomenclature - Why is UuX used as a symbol for unnamed elements on the . . .
Until recently, the last few elements on the periodic table had the chemical symbols (now they have formal chemical symbols!): Uub, Uut, Uuq, Uup, Uuh, Uus, and Uuo Why did they have these tempor
- Why most of the atoms with fully filled outer orbits are gaseous?
Most of the elements with fully filled outer orbits are gaseous in nature (He, Ne, Ar, Kr, Xe, Rn) with exception of Uuo (as per Wikipedia its solid) Why these fully filled outer orbit elements are always gaseous in nature?
- Can metals have a net negative charge - Chemistry Stack Exchange
More interestingly, regarding the possibility of noble gas anions, all noble gases up to radon have an endothermic electron affinity, and could not even in principle stabilize a negative charge on them However, due to relativistic effects, the superheavy noble gas ununoctium may be able to form an isolated UuoX − anion, though it would presumably be quite reactive Whether a compound can be
- What is advantage of creating elements that disappear in a flash?
The Island of Stability is believed to be centered around 120 protons and 180 neutrons Element 118 X194X21942Uuo has been produced, and while its most stable isotope has a half-life of only 0 89 ms, it is very close to the island of stability and there may be a heavier, more stable isotope of Uuo out there
- Is beryllium an alkaline earth metal? - Chemistry Stack Exchange
Alkaline metals are called so because of two reasons: They are obtained from the earth in the form of ores Their oxides and hydroxides show basic (alkaline) natures Beryllium fulfills the first criterion but not the second one, since its oxides and hydroxides show amphoteric behavior, rather than alkaline So, it is not considered an alkaline earth metal in the true sense, even though it does
- Why are there so many metals in the periodic table?
Brief Background: I was studying about the 'classical electronic configuration' of the first 20 elements of the periodic table today and was bewildered by the fact that there are an equal number of
|
|
|