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1- BNCT relies on the initial targeting of tumor cells by an appropriate chemical compound tagged with 10 5 B , which preferentially concentrates in tumor cells. During the irradiation of the tumor site by neutrons ( 1 0 n ) the 10 5 B absorbs a low-energy neutron ( 1 0 n ), and it ejects an energetic short-range alpha particle ( 4 2 α or 4 2 He ) and lithium ion along with gamma radiation (γ ). This radiation deposits most of its energy within the cell containing the original 10 5 B atom. Therefore, if a higher concentration of 10 5 B exists in tumor cells relative to other normal tissues, a concomitantly higher dose will be delivered to the tumor cells during neutron irradiation.What is the nuclear reaction that takes place in the tumor cell?Express your answer as a nuclear equation.
2- Calculate the mass defect of the fluorine nucleus 19/ 9 F . The mass of neutral 19 / 9 F is equal to 18.998403 atomic mass units.Express your answer in atomic mass units to four significant figures.
3- Calculate the binding energy E B of the fluorine nucleus 19 / 9 F .Express your answer in millions of electron volts to four significant figures.
4-234/ 90 Th undergoes beta decay. What is the atomic number of the resulting element?Express your answer numerically as an integer.
5-What is the value of A in the following nuclear reaction?237 / 93 Np→ 233 / 91 Pa+ A/ Z XExpress your answer as an integer.
Evaluate the electronic configuration for ionization energies of Magnesium, the orbital number in which the electrons are added in phosphorus ion, and the one will lose in the ionization of Alluminium.
Find the mass of the substance and the volume of a gas in a reaction - determine the mass of solid ammonium nitrate that must be used to obtain 0.145 L of dinitrogen oxide gas at STP.
A compound contain 60.87% carbon, 4.38% hydrogen, and 34.75% oxygen then determine its empirical formula?
Petroleum consumption in the US in 1990 supplied about 34.6E15 kJ of energy. Of this quantity, about 14.3E15 kJ was supplied by foreign sources.
Determine the mass of this substance should evaporate in order to freeze 190 grams of water at 25 degree Celsius initially? It is given that the heat of fusion H 2 O= 334 specific heat of H 2 O= 4.18
Find the amount of known substance present in the mixture and determine the mass of calcium carbonate present in original mixture.
Determine what would you use to prepare 10 ml of 0.2M CaCl 2 from the 20M stock solution and find out which solution is with pH > 7, but is not an Arrhenius base in the strict sense?
Compute the number of grams of H 2 SO 4 in 1 gallon of battery acid if the solution is 38.9% sulfuric acid by mass and has a density of 1.33g/mL ?
What is the final concentration of Na+ after adding 230 ml of water to a stock solution of 2.5M 420.0 ml Trisodium phosphate?
The _______ of a titration occurs when the indicator changes color.
Oleum or fuming sulfuric acid available commercially in concentrations ranging from 20 to 99.9% sulfur trioxide. Discuss at least three potentially hazardous features associated with concentrated sulfuric acid.
Calculate how many grams of phosphorus are present in 2.68 moles of phosphorus pentachloride(PCl5) and also determine the numbers of moles of chlorine are present in 3.71 grams of phosphorus pentachloride?
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