Predict the atomic mass of sodium. Sodium 's Atomic mass = nearable to the average mass of potassium and lithium . Protons (positively charged, have an atomic mass of about 1) 2. In this problem, we have an isotope of lithium-8, which means that it has a mass number of 8: so, the sum of neutrons+protons in its nucleus is 8: 10 years ago. Lithium was used in 1932 as the target metal in the pioneering work of British physicist John Cockcroft and Irish physicist Ernest Walton in transmuting nuclei by artificially accelerated atomic particles; each lithium nucleus that absorbed a proton became two helium nuclei. Atomic Mass of Lithium. Given the information that 92.58 percent of all lithium atoms found in nature are lithium-7 and 7.42 percent are lithium-6, calculate the atomic mass of lithium, Li (atomic number 3). 92.5% of lithium is 7 Li. Mass of 1 neutron = 1.008665 atomic mass units. Lithium has two natural occurring isotopes Li-6 in Li-7.Which isotopes would you predict to have the highest percentage in nature and briefly provide your reasoning must contain a brief but complete explanation why you think so. Request. Find the mass of the bare lithium- 7 nucleus. So Li=7,K=39. Lithium has 3 protons thus even if it has 4 neutrons it is still atomic number of 3 The atomic mass of lithium is 6.9 41AMU. Therefore, an isotope of LIthium-7 has a mass number of 7. Answer Save. The atomic mass is the mass of an atom. An element in the alkali metals family. It has a mass of 7.016 u. It is both naturally occurring and a produced by fission. The lithium-7/lithium-6 ratio is between 12 and 13. All Chemistry Practice Problems Atomic Mass … Often, the resulting number contains a decimal. Electrons … Its atomic number is 3. Atomic mass of Lithium is 6.941 u. So mass number can vary from 3 to infinity for lithium. If lithium has an atomic number of 3 and a mass number of 7, the correct number of protons, neutrons, and electrons, respectively, is: This question is part of Inside of Atom - atomic number & mass quiz. Answered Sep 19, … According to law of triads the atomic m. If playback doesn't begin shortly, try restarting your device. The atomic mass or relative isotopic mass refers to the mass of a single particle, and therefore is tied to a certain specific isotope of an element. Example: Calculating the atomic mass of a given chlorine sample where two isotopes are mixed. Calculate the natural abundances of these two isotopes. Lithium (from Greek lithos 'stone') is a soft, silver-white metal with symbol Li.It is the third chemical element in the periodic table.This means that it has 3 protons in its nucleus and 3 electrons around it. New questions in Chemistry. It has the atomic symbol Li, atomic number 3, and atomic weight [6.938; 6.997]. In spite of the name "mass number"... t's not a measure of "mass", but rather a count of nucleons. Because of its nuclear properties, lithium-7 is less common than helium, beryllium, carbon, nitrogen, or oxygen in the Universe, even though the latter four all have heavier nuclei. The first isotope has an atomic mass of 34.96885 and has an abundance of 75.78%. Read More Inspire your inbox – Sign up for daily fun facts about this day in history, updates, and special offers. Scientists determine the atomic mass by calculating the mean of the mass numbers for its naturally-occurring isotopes. The mass of a lithium-7 atom = 7.016003 amu. 5 Answers. 0. 82.58 % is 88 Sr with mass of 87.9056 amu An isotope of lithium-8 contains 5 neutrons. Its mass number is 6.94. Lithium: Symbol: Li: Atomic Number: 3: Atomic Mass: 6.941 atomic mass units: Number of Protons: 3: Number of Neutrons: 4: Number of Electrons: 3: Melting Point: 108.54° C: Boiling Point: 1347° C: Density.53 grams per cubic centimeter: Normal Phase: Solid: Family: Alkali Metals: Period: 2: … Learn this topic by watching Atomic Mass Concept Videos. Naturally occurring isotopes. Favourite answer. Relative lithium-7 abundances as high as 35.4% greater than the natural value have been measured in gr… First, we have the atomic symbol, which is a combination of letters representing that element. Relevance? Mass numbers of typical isotopes of Lithium are 6; 7. You can describe an atom based on three basic subatomic particles: 1. Lithum-6 (Li 3 atomic number. Lithium 7 Metal is one of over 250 stable Metallic isotopes produced by American Elements for biological and biomedical labeling, as target materials and other applications. 6 mass number) Lithium-7 (Li atomric number 3. Some of the material remaining from the production of Lithium-6, which is depleted in Lithium-6 and enriched in Lithium-7, is made commercially available, and some has been released into the environment. awilliams. FREE Expert Solution Show answer. K87 Li II Ground State 1s 2 1 S 0 Ionization energy 610078 cm-1 (75.6400 eV) Ref. Rare lithium-6 (mass of 6.015 u) has only 3 neutrons, reducing the atomic weight (average) of lithium to 6.941. read more zoomid 6365663209password 1 4. Follow. The atomic masses of lithium and potassium are 7 and 39 respectively. The number of electrons is same as the number of proton = 3 The mass of lithium as stated above is 7 Mass number = 7 Mass number = number of proton + number of neutrons This is how lithium ’ S atomic mass of potassium and lithium lithium. Biochemistry research ; 7 ) 3 If the average atomic mass units are 6 ; 7 16, by... Of 6.0151 atomic mass of the medical research radioisotope Be-7 of typical of! 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