The elemental dissolution behavior of the above-described four samples was investigated in 0.01 M KCl prepared from Potassium chloride (suprapur, Merck). The measured sample area was approximately 0.01 cm2. A Pt-wire counter electrode and a reference electrode (Ag/AgCl/3 M KCl) were ...
Moseley then needed a function of the nucleus that increased in the same pattern, that is, by one for each element in turn and that was the atomic number. You can have more information on Henry G J Moseley and his discovery of atomic number by going through the lesson at...
Today, you can find poets and poetry of all sorts. While poetry may not be as much a part of the mainstream as it had been in previous generations, it's certainly not a lost art form if you know where to look. Many bars, cafés and schools still host poetry readings where experienced...
The radioactive isotope of potassium occurs at an extremely low concentration, and potassium is necessary for good health [source: HPS]. X-rays are essentially the same as gamma rays, but their origin is different. Where gamma rays come from inside the nucleus of an atom, X-rays come from...
How is average atomic mass calculated? How much heat is required to raise the temperature of 475 grams of solid aluminum from room temperature (295k) to liquid aluminum at 1050K? Aluminum melts at 933.47k. How do you solve cubed conversions of units through dimensional analysis, and how do...
1.) When analyzing the composition of the human body, 1.5% of the mass of the human body us made up of calcium. Calculate the number of moles of calcium in a person who has a mass of 150 pounds (1lb=0 If a piece of aluminium consists of 6.02*10^{23} atoms, how much does it...
Calcium, copper, iron, potassium, magnesium, sodium, phosphor and zinc could now be detected and quantified by Inductively Coupled Plasa Atomic Emission Spectroscopy (ICP-AES) with a Thermo iCAP-6500 DV (Thermo Fischer Scientific, Cambridgeshire, United Kingdom). The chloride content was estimated ...
And if a simple lead vest is enough to block the x-rays, why does the dentist need to hide behind a shielded wall? How powerful are the x-rays anyway? How dangerous are they? And just how much radiationcanthe human body absorb without risking cancer – or worse...
Chemistry, calls it "aluminium." You can trace the confusion back to Sir Humphry Davy, who first identified the then-unknown element as "alumium." This he later changed to "aluminum" and finally to "aluminium," which carried an ending similar to potassium and sodium, other metals Davy ...
What does 'the limit of a constant is a constant' mean? What is the equation for Argon 39 decaying into potassium 39? What are the three physical factors that affect reaction rates? What is the formula for finding the natural unemployment rate?