Draw atomic depictions for(a) ²⁰⁷₈₂Pb; (b) ⁹₄Be; (c) ⁷⁵₃₃As

Q: A 5.4-μg sample of 226RaCl2 has a radioactivity of 1.5x105 Bq. Calculate t1/2 of 226Ra

A: The number of Ra atoms is calculated as, The number of Ra atoms is .

Q: For each pair of elements listed, predict which one has more stable isotopes. b) For Se b) Co or Ni…

A: (a) F or Se : Atomic number of F = 9, so it has 9 protons, and its mass number is 19. Atomic number…

Q: a magnesium atom loses 2 electrons to achieve stability and a magnesium ion is obtained: a-translate…

A: A process in which the valence electron(s) of an atom removes and converts the atom into an ion is…

Q: g. Formátion of h. Formation of Polonium-215 through alpha decay through positron emission ISSION

A: Positron emission: Positron emission or beta plus decay is a subtype of radioactive decay called…

Q: The nucleus of 6Li is a powerful absorber of neutrons. It exists in the naturally occurring metal to…

A: Given nucleus is Lithium .

Q: What would 0.03 bq of Cs be equivalent to? What i mean by this is, how much is that when compared to…

A: Given :0.03 bq of Cs  We have to determine:  What would 0.03 bq of Cs be equivalent to i) in terms…

Q: Now that you have the contribution from the X-19 isotope (2.715) and from the X-21 isotope (18.00),…

A: Given the contribution from the X-19 isotope = 2.715 amu contribution from the X-21 isotope = 18.00…

Q: How many protons, neutrons and electons are in 31P3-

A: The element  31P3- It is Phosphorus and having atomic number 15 and atomic mass 31.

Q: What amount of energy is needed to transform 7.55 grams of H2O at 57°C to 114°C?

A: The energy needed to raise the temperature is given by the equation, Q=m×c×∆TQ→energy neededm→mass…

Q: The daughter isotope of 19O8, when it undergoes beta emission, is19 F9. True or False?

A: Beta decay (β-decay) is a type of radioactive decay in which a beta particle (fast energetic…

Q: Calculate the mass (in grams) of O2 that isproduced by photosynthesis when 2.49 × 104 kJ of solar…

A:

Q: Write the radioactive decay equation for Po-216 and Tc-99.

A: The given radioactive nuclei are Po-216 and Tc-99.  There are three types of decay observed in…

Q: what mass of sodium is also produced?

A: Given :- 2Na3N → N2 + 6Na  Mass of N2 produced = 29.7 g  To calculate :-   Mass of sodium (in g)

Q: Calculate the mass of a proton( 1.67 X10-27 Kg) IN MeV/C2?

A: Given information,         Mass of proton is 1.67 X10-27 Kg

Q: What type of decay would you expect tritium, H to undergo? Write the nuclear equation for the…

A:

Q: The element neptunium (Np) has a radioactive isotope called 237N.. 237NP can undergo alpha deca to…

A: Given reaction: N237p → ? + H4e We have to find the missing atom.

Q: The elements of group 1 are reactive but those of griup 18 are inert, why?

A:

Q: What is the atomic mass of C₂H10ON2? O 64.108amu O 73.075amu 78.115amu O 66.104amu

A: Given, Atomic mass of C2H10ON2 = ? Note: Atomic mass of C = 12.011 amu Atomic mass of H = 1.00784…

Q: Silver has two isotopes that are common  in nature. Ag - 107 and  Ag - 109. What  makesthese  two…

A: The solution is given below -

Q: What type of decay would you expect tritium, 3H to undergo? Write the nuclear equation for the…

A: To find: The type of decay and the nuclear equation for the decay

Q: If the onigingl Sample o zn had a mass of l-49. what mass of Žnca can be produced in tthe reachunz…

A:

Q: 19. SO3² 20. NO, 21. H,О*

A: The question is based on the concept of chemical bonding.   by using VSEPR theory , we have to…

Q: 238,,U +15n - What element is synthesized from the reaction: > 70-1B + 253 85At 25399Et 146 100FM…

A: XAZ , X is any element.A is atomic number.Z is atomic mass.(Z-A) is number of neutrons in…

Q: Use Einstein’s equation, the mass in grams of 1 amu, andthe relation between electron volts and…

A: Given: Mass difference, ∆m = 1amu Energy equivalent of a mass difference of 1amu is calculated as…

Q: What is the positron emission of manganese–51

A: A nuclear reaction involves the conversion of nucleus with the emission of certain nuclei or small…

Q: 3. What are the number densities of U-235 and U-238 in 10.4 g/cc UO₂ fuel if the fuel is power…

A: Given: Density of Uranium oxide (UO2) =10.4 g cm-3 Fuel enrichment (ωi)                    = 3.4573…

Q: When Cu-65 is bombarded by C-12, three neutrons and another particle are produced. Write the…

A: Nuclear fusion reactions : The reactions in which two or more atomic nuclei combined to form a…

Q: Discuss the application of thorium as a source of nuclear fuel

A: Thorium can also be used as alternative source of nuclear fuel due to following applications: There…

Q: 5. How many grams of Calcium will it take to replace 1 gram of Hydrogen?

A: No of moles = Mass / Molar mass

Q: Write nuclear equations for the following process: Krypton-81 undergoes beta decay

A: Beta decay (β-decay) is a type of radioactive decay in which a beta particle (fast energetic…

Q: Synthesizedwas Xept Fg (440,37 a mot). the पणा क नष ने 5 0 लही %

A: Given compound = XePtF6 Molar mass of compound = 440.37 g/mol Molar mass of platinum = 195.08 g/mol…

Q: 23 t of OilooM caletHM te 37.5nt O (२० Coc10 \() S lver nitratle iuhat is A sthe mass of ta cl…

A: Consider the given balanced equation as; CaCl2 aq  +  2 AgNO3 aq  →  2 AgCl s  +  CaNO33 aq Given…

Q: How do you figure the nuclear equation for decay for 241 Pu 94 giving off beta particles?

A: Beta decay is the radioactive process in which beta particle is emitted i.e. an electron Or a…

Q: What charge would exist on chlorine (#17) after it reacts with a rubidium atom (#37)?

A: We would check electronegativity values of determine the charge.

Q: What is the energy change when the temperature of 14.6 gaseous xenon is decreased from 38.7 °C to of…

A: Given information:Mass of xenon gas = 14.6 gInitial temperature = 38.7 oCFinal temperature = 23.5…

Q: where did the 3.18 come from?

A:

Q: Where the 2.303 comes from?

A: 2.303 comes from the conversion of the "ln" function into the "log" function. ln(Keq) = 2.303 *…

Q: How do you figure the nuclear equation for decay for 241 Am 95 as they undergo alpha emission?

A:

Q: Where does the 2.303 come from?

A:

Q: What is the nuclear equation for decay for 237 Np 93

A: Given 237 Np 93 The element is neptunium with atomic number 93 and mass number 237

Q: What weight (in milligrams) of potassium

A:

Q: 2. A certain OTC antacid contains 800 mg of calcium carbonate (CaCO3) per tablet. How many mEq of…

A:

Q: , Bi-214 undergoes B decay. W

A:

Q: Natural uranium consists almost entirely of 238U. To operate a nuclear power reactor, the fuel must…

A: Isotopes are atoms of the element with same atomic number and different atomic masses. So in these…

Q: Write balancęd nuclear equations for the following: 10. Nitrogen-13 decays by positron emission

A:

Q: (а) х + 9B 244Pu 94 → X + He 238 92 (с) х "N + je

A: when radioactive nuclei decay it Emmitts radiation,  in the forms of high energetic rays alpha, beta…

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.