The atomic number of iron is 26. The electronic configuration is: {eq}1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{6} {/eq} Hence, the valence...
How many days does February have on a leap year? How to find the number of sides of a polygon using the given angle? How many career clusters are there? How many baseballs are used in a game? A rectangular cube of iron (density = 7,860 kg/cubic m) floats on mercury (density = ...
They got it from space. Stars continue to forge iron, and it ranks in the top ten most abundant elements in the Universe. There is iron flying all around space in the form of asteroids and meteoroids, and fragments of these bodies sometimes fall to Earth. Meteorites contain much higher co...
Commercialization is widely believed to be achievable for metal halide perovskite solar cells with high efficiency and low fabrication cost. However, stability remains a key obstacle for them to compete with established photovoltaic technologies. The pho
18 November 2016 Vitalii Zablotskii, Tatyana Polyakova, Oleg Lunov & Alexandr Dejneka The biological effects of high-gradient magnetic fields (HGMFs) have steadily gained the increased attention of researchers from different disciplines, such as cell biology, cell therapy, targeted stem ce...
Why don't ionic compounds have electrical conductivity as a solid but they do as a liquid? Explain the distinctly behavior in the conductivity of NaCl(s) and NaCl(aq). What species are present in each of these substances? Why does not NaCl(s) conduct electricity?
What is the number of valence electrons in aluminum? List the noble gas elements. How does the number of atoms in a 27.5-gram zinc ring compare to the number in a silver ring of the same mass? How many degrees of freedom does a 1-D string of atoms have as shown below (dashed lines...
The biological effects of high-gradient magnetic fields (HGMFs) have steadily gained the increased attention of researchers from different disciplines, such as cell biology, cell therapy, targeted stem cell delivery and nanomedicine. We present a theoret
Why are heavier elements not much larger than lighter elements? How do metals differ from nonmetals with regard to (a) number of valence electrons, (b) conductivity of heat and electricity, and (c) phase? How do metallic character change (a) across a period and (b How do scientists know...
How many zero's to the right of the decimal does two thousandths of an inch have?Decimal:A denominator is expressed in terms of fraction in which denominator is a power of ten and the numerator is denoted by figure placed to the right of the decimal point. For example, i...