http://www.cjass.ca/conv49n4.html Ref : The Electronic Absorption Spectra of Lanthanum (III), Cerium (III)and Thorium (IV) Ions in Different Solvents Rafie H. Abu-Eittah*, Sayed A. Marie and Mabrouka B. Salem. Canadian Journal of Analytical Sciences & Spectroscopy Received: May 19, 2004 Accepted (in revised form): August 2, 2004 See the Web Links to the left of this answer for a direct link to the pdf of this article.
Atomic mass is so small you can't actually measure it. So, just like carbon dating, you have to use a relative mass.
He invented atomic power He came up with the theory of Relativity. He came up with the theory of Gravity. He had all these equations like E=mc2
a cube of any size can fit infinitive pyramids, because the pyramids don't have an actual limit to their size, so they can be really small, like atomic level or smaller, this would make the result infinitive.
Acarbose is an antihyperglycemic drug taken orally for Type 2 diabetics. It works by delaying the absorption of carbohydrates in the small intestine so that the blood glucose level doesn't rise drastically after a meal. It also reduces levels of glycosylated hemoglobin. It is contraindicated for those with bowel disorders like peptic ulcer disease or diverticulitis.
in propositional logic a complete sentence can be presented as an atomic proposition. and complex sentences can be created using AND, OR, and other operators.....these propositions has only true of false values and we can use truth tables to define them... like book is on the table....this is a single proposition... in predicate logic there are objects, properties, functions (relations) are involved.
Elements from atomic number 57 (Lanthanum) to 71 (Lutetium) are called the Lanthanides. Lanthanide means "like Lanthanum" and so, the Lanthanides are based on Lanthanum. Only one of the Lanthanides is radioactive: Promethium (Pm - No. 61)
Elements from atomic number 57 (Lanthanum) to 71 (Lutetium) are called the Lanthanides. Lanthanide means "like Lanthanum" and so, the Lanthanides are based on Lanthanum. Only one of the Lanthanides is radioactive: Promethium (Pm - No. 61)
The elements with atomic numbers 58 to 71 are called Lanthanides or Lanthanoids. This literally means "Like Lanthanum". They are called this because they have similar characteristics to Lanthanum.
That seems like a question you should be answering for us. I can think of several reasons for doing so, but why you specifically are doing it, you should know better than we do.
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Most, 99.91%, of the lanthanum found in nature is 139La, which is not radioactive. The other 0.09% is made up of 138La, which is radioactive but has a very long half life of 105,000,000,000 years. Like all elements, lanthanum has synthetic radioactive isotopes.
Each element has a distinctive spectrum unlike that of any other element. The remainder of the analogy should be fairly clear.
Sure, because in the episode "Ghosts with Dirty Faces" Spectra said something romantic.
Radiation is used for some things like when people have cancer they do somthing with that and when people make nuclear bombs and when it hits it sends out LOTS!!! of radition which can KILL you.
Basically, each molecule has well defined energy levels (vibrational, rotational, ecc.) which are related to the molecule properties like its mass, its length, its symmetry, its moment of inertia and so on. The excitation (deexcitation) of each one of these levels requires the absorption (emission) of some precise amount of energy which can be provided by photons. So, knowing the physical properties of a molecule allows to know at which energies it can absorb or emit photons (electromagnetic radiation). In this way it is possible to excite a gas with a known intensity of photons, at different energies (spectra), and compare it with the resulting intensity of photons emerging from the gas. Observing the resulting peaks of absorption in a Absorbance vs. Energy diagram allows to determine which molecules species are present in the gas.
the atomic symbol of oxygen looks like this 0
microvilli