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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.
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Why atomic mass is called relative atomic mass?
Atomic mass is so small you can't actually measure it. So, just like carbon dating, you have to use a relative mass.
What did Albert Einstein do to help?
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
How many pyramids fit in 1 cube?
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.
What is the mode of action of acarbose?
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.
What is the difference between predicate and propositional logic?
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.
What microscope can plot an absorption spectrum of the item under examination?
A spectrophotometer is an instrument commonly used to measure absorption spectra of samples. Microscopes do not typically have the capability to measure absorption spectra like a spectrophotometer can.
Why do we say atomic spectra are like fingerprints of the elements?
Atomic spectra are like fingerprints of elements because each element has a unique set of discreet emission or absorption lines in its spectrum. These lines correspond to specific energy levels of electrons within the atoms of that element. By analyzing the pattern and position of these lines in a spectrum, scientists can identify the elements present in a sample.
What is the use of Atomic Absorption in Forensic?
Atomic absorption is used in forensics to analyze trace elements in samples such as blood, hair, or soil. By measuring the absorption of specific wavelengths of light by the atoms in the sample, atomic absorption spectroscopy can determine the presence and concentration of elements like arsenic, lead, or mercury, which can be crucial in solving criminal cases.
What series are called elements 57 to 70?
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)
What are the 2 words that describe the classification of the 17 chemical elements with the numbers 57-71?
Lanthanides and rare earth elements are the two classifications for the chemical elements with atomic numbers 57 to 71. These elements are a group of 15 metallic elements typically placed at the bottom of the periodic table.
Why is the atomic emission spectra like fingerprints?
Atomic emission spectra are like fingerprints because they are unique to each element. Each element has its own specific set of energy levels and electron configurations, resulting in a distinct pattern of spectral lines when the element emits light. This characteristic pattern can be used to identify and distinguish different elements, similar to how fingerprints are unique to each individual.
Why do i study absorption spectra of the dye?
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.
Hydrogen-like atom spectra and Bohr atom spectra?
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Can you tell from these absorption spectra whether red light is effective in driving photosynthesis?
No, absorption spectra provide information on the wavelengths of light that are absorbed by a pigment, but they do not inherently indicate the effectiveness of that light in driving photosynthesis. Red light is typically absorbed by chlorophyll, making it effective in photosynthesis, but further experiments like action spectra or photosynthetic rate measurements are needed to confirm its effectiveness.
Is lanthanum radioactive?
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.
What are the atomic numbers from 58 to 71 called?
The atomic numbers from 58 to 71 are called the lanthanide series. They include elements such as cerium, praseodymium, and terbium, and are known for their similar chemical properties and the filling of the 4f subshell.
Why doesn't the action spectrum for photosynthesis exactly match the absorption spectrum of chlorophyll a?
The action spectrum for photosynthesis doesn't exactly match the absorption spectrum of chlorophyll a because other pigments, like chlorophyll b and carotenoids, also play a role in capturing light energy for photosynthesis. These additional pigments have absorption peaks at different wavelengths, contributing to the overall light absorption by the plant. As a result, the combined absorption spectra of all pigments involved in photosynthesis do not perfectly align with the action spectrum.
