A rough estimate of the radius of a nucleus is provided by the formula r 5 kA1/3, where k is approximately 1.3 × 10-13 cm and A is the mass number of the nucleus. Estimate the density of the nucleus of 127I (which has anuclear mass of 2.1 × 10-22 g) in grams per cubic centimeter. Compare with the density of solid iodine, 4.93 g cm-3.

Q: Directions: Complete the table below. Hypothetical Mass No. No. of p+ No. of n No. of e- Atomic no.…

A: A pure substance that is made up of a no. of atoms having equal no. of protons in its nucleus is…

Q: Please calculate, how many atoms exist in 1cm^3 of copper with the density 8,93 gr/cm^3 and the…

A: 1 cm3 of copper with the density 8.93 g/cm3, whose number of atoms is to be determined.

Q: Is the statement inconsistent with Rutherford’s nuclear theory as it was originally stated? Why? The…

A: In his nuclear theory, Rutherford states that the nucleus of an atom contains most of the mass of…

Q: Get 3 proton-rich  isotopes and 3 neutron-rich isotopes including the stable isotope (N = Z) of an…

A:

Q: A biochemist who is studying the properties of certain sulfur (S)–containing compounds in the body…

A: Elements are arranged depending on their chemical and physical properties. Sulfur is a group of 16…

Q: The weight of the hypothetical element Gg is 105.52 amu. Element Gg was found to have 3 stable…

A:

Q: tor the elumantal 198 Re 75 Symbol There are protons and neutrons

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Q: 77 78 79 80 81 Ir Pt Au Hg TI Iridium Platinum Gold Mercury Thallium 192.22 195.08 196.97 200.59…

A:

Q: Gallium (Ga) consists of two naturally occurring isotopeswith masses of 68.926 and 70.925 amu. (a)…

A: (a) The atomic number of gallium is 31. Thus, all isotopes of this element (gallium-69 and…

Q: Explain the Properties of Protons ?

A: The properties of protons has to be explained.

Q: Which set of elements below contains, respectively, an alkali metal, a halogen, and a transition…

A: Alkali Metals are Group 1 elements. Halogens are Group 17 elements. Transition metals are d-block…

Q: f you look at Gallium's atomic mass on the periodic table, which isotope is more abundant in nature:…

A: Gallium belongs to IIIA group in the periodic table. There are two isotopes of Gallium that occurs…

Q: Variations in average atomic mass may be observed for elements obtained from different sources.…

A:

Q: Part C 98 43 Enter your answers numerically separated by a comma. ? ....... Np, Nn = protons,…

A: The question is based on the concept of atomic structure. We have to identify number of subatomic…

Q: Explain the similarities and differences as compared to element 118 Og if a new element was…

A: A question based on periodic trends that is to be accomplished.

Q: How many protons are in the nucleus of an atom of each.( put  between each number ex, 12,24,10,5,3…

A: An atom can be considered as the smallest unit of any matter. An atom is composed of certain…

Q: What do you mean by deuterium ? how it is symbolized ?

A: Given term,           Deuterium

Q: Define and explain the difference between molecular weight and atomic weight. With examples. 5.…

A: Atomic mass is the mass of an atom.

Q: Isotope Abundance Mass 69.9242 amu 70 Ge 20.8% 71.9221 amu 72 Ge 27.5% 72.9235 amu 73 Ge 7.75%…

A:

Q: If one gallon of gasoline contains about 2.0 g of lead, how much lead (in kg) is emitted into the…

A: The given data contains, one gallon of gasoline contains 2.0 g of lead.

Q: Given the isotopic data determine the average atomic mass of the element.  1) Show the calculation…

A:

Q: The identity of a nucleus is determined by its   A. proton #   B. radioactive intensity   C.…

A: Nucleus of an atom contains proton and neutron.

Q: B15.3 The graph shown represents the relation between charge of accumulated copper ions Q and the…

A: Introduction: According to Faraday's first law of electrolysis, the quantity of ions deposited at…

Q: How to calculate the relative atomic mass (6.015122) of 6Li, from the atomic mass of Lithium?

A: As we know,  Relative atomic mass = atomic mass of an atom / 1 amu

Q: Calculate the average isotopic mass of krypton given: Mass / u. Percentage (%) 77.920 0.350 79.916…

A: Calculation of average is done by Mavg = ∑MiXi

Q: How many distant nucleus pairs are in NH, molecule? a. 16 b. 1 C. 8 d. 6 c. 4 f. 2 9. 12 h. 3

A: Distant nucleus pairs can be calculated by considering number of nucleus.

Q: Which one of the following species has as many electrons as It has neutrons? A) 1H C) 14c E) 14c2+…

A: The species that have many electrons as it has neutrons has to be given.

Q: Starting from the Clasius-Clapeyron equation, log p : Lo + constant and assuming the latent heat of…

A: The Clausius-Clapeyron equation is:

Q: Which element is not a main-group element?a) Se                      b) Mo                     c) Sr…

A: Main-group elements: S-block and P-block elements are knows as main-group elements. They are,…

Q: To how many significant figures would you need to express the mass of an thorium-228 atom in amu to…

A: Isotopic mass of thorium-228 is 228.0287411 amu Rest mass of an electron in amu = 0.00054858 amu

Q: 3. Derive the expression of the electron's charge to mass ratio: e 125R?V 32uN² 1²r2 me

A:

Q: A biochemist who is studying the properties of certain sulfur (S)–containing compounds in the body…

A: Periodic table represents the systematic arrangement of elements in which the properties of these…

Q: What are alums? Give examples other than potassium alum.

A: Double salts are the salts that dissociate into all its constituent ions completely. Example is Mohr…

Q: The Group on the Periodic Table that BEST demonstrates the concept that elements in the same Group…

A: An atom is the basic and fundamental unit of matter. An atom consists of electron and the nucleus in…

Q: A general formula of nucleus is given as AZX2+; here A is mass number, and Z is atomic number.…

A: The protons and neutrons in the nucleus of an atom are called as nucleons. Protons are positively…

Q: mass spectrometer is being used to separate common oxygen-16 from the much rarer oxygen-18, taken…

A:

Q: Given the following reactions:             (I)   M  + Cl2  -->  MCl2;                        (II)…

A: To determine in which cases, M could represent Group 1A elements.

Q: How are elements heavier than helium formed in the stars, particularly until iron?  How are elements…

A: The chemical element helium has the atomic number 2 and the letter He in its name. It is the first…

Q: d) how many 4°K atoms are present in a piece of copper block weighing 615 g? The percent isotope…

A: 12. d) The mass of the copper block is = 615 g The percent of 40K isotope is = 12.05 % The number of…

Q: Consider the following data: isotope                  atomic mass                    abundancy%…

A: ANS. Option B) 31.19 amu

Q: Be-Be+ 235 ốn+3U→ 92 222 Rn ->>>> 86 +He 141 Cs+R 55

A:

Q: What is the spin quantum number, ms, for Uqn-140’s last placed electron?

A:

Q: Write isotopic symbols in the form X–A (e.g., C-13) for the given isotope. the hydrogen isotope with…

A: Isotopes are atoms of same elements which have same atomic number but different mass number. In…

Q: 1. The radius of a Cl nucleus is 4.0 fm, and the radius of a Cl atom is 100 pm. (1 fm = 1 x 10-¹5 m;…

A: Radius of Cl nucleus is 4.0 fm And 1 Fm = 10-15 m radius of nucleus = 4 × 10-15m Diameter = 2 ×…

Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, Ilocated in the outer Solar…

A: As it is given the mass of isotope and it's relative abundance. So we can easily calculate the…

Q: In the equation used to determine the energy of the particles described in question (11), E = hc/λ,…

A: The given equation is  E = hc/λ

Q: 165 21. Identify the neutron-to-proton ratio for the isotope 67H0 and determine if the isotope is…

A: Identify the neutron-to-proton ratio in the given nuclide--

Q: 11. Complete the following table by filling in the number of electrons in the last column and by…

A:

Q: Gold is very malleable which means it can be pounded into very thin sheets. Decorative gold leaf can…

A:

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.