The figure shown here is a rep- resentation of 50 atoms of a ficti- tious element with the symbol Nt and atomic number 120. Nt has three isotopes represented by the following colors: Nt-304 (red), Nt-305 (blue), and Nt-306 (green). (a) Assuming that the figure is statistically representative of naturally occurring Nt, what is the percent natural abundance of each Nt isotope? (b) Use the listed masses of each isotope to calculate the atomic mass of Nt. Then draw a box for the element similar to the boxes for each element shown in the periodic table in the inside front cover of this book. Make sure your box includes the atomic number, symbol, and atomic mass. (Assume that the percent- ages from part a are correct to four significant figures.) Nt-304 303.956 amu Nt-305 304.962 amu Nt-306 305.978 amu

Q: 2. The approximate radius of a nucleus, r, is given by the formula r = A$(1.3x10-13cm), where A is…

A: Given: Atomic radius of Al = 143 pm Radius of nucleus=A13(1.3×10-13) cm

Q: If you had a balance that could determine the mass of aproton, how many electrons would you need to…

A: Mass of a proton is 1.67×10-27kg and the mass of the electron is 9.31×10-31kg.

Q: There are three isotopes of an element, X-28, X-29, and X-30, with relative abundances of 92.2297%,…

A: Given  molar mass of X1 = 28 with abundance 92.2297% molar mass of X2 = 29 with abundance 4.6832%…

Q: Identify the mass law that each of the following observationsdemonstrates, and explain your…

A: Concept introduction: Law of definite proportion: According to this the ratio of the elements…

Q: Uranium-235 is used in nuclear fission. Determine the number of protons and the number of neutrons…

A: Atomic symbol of element gives information about the chemical symbol, atomic number and mass number…

Q: icate the answer choice that best completes the statement o Which of the following statements is not…

A: Which property is not true for zinc

Q: ilicon has three common isotopes, with the masses and isotopic abundances shown elow: licon-28 --->…

A: Given-> M1= 27.98 u.        P1=0.882% M2=28.98u.           P2=0.018% M3=29.97 u.

Q: Iron exists in nature as a mixture of predominantly three isotopes: ⁵⁴₂₆Fe (53.94 amu), ⁵⁶₂₆Fe…

A: We have to calculate the percentage of rarest of three isotopes.

Q: (a) In the certain hydrated salt MSO3:4H2O, the mass percentage of H2O is 44.71%. Identify the…

A: The mass percentage of an element is the mass of that element / total mass of the compound. We can…

Q: Natural carbon, which has an atomic weight of 12.011 amu, consists of carbon-12 and carbon-13…

A: Average mass of an element is defined as the atomic mass of the element calculated by multiplying…

Q: 2.77 Identify the following as elements or compounds: NH3, N2, Sg, NO, CO, CO,, H2, SO2.

A: Matter is any substance that occupies space and volume. Matter is classified into pure substances…

Q: 29 3. What information cannot be determined from the symbol notation 14Si? O the atomic mass O the…

A: The symbol notation given is

Q: in chemistry class, a group of students dtermined the mass-t-charge ratio for an electron to be 5.64…

A: Given: mass to charge ratio = 5.64×1012 kg/C Charge of electron = 1.605×10-19 C   Note:There is typo…

Q: Which of the following gases are elements? O NH, O 0, O N,0 Rn Ar O 0, so, O H,S HCN NO NO, O He

A: Elements are the pure substances that are made up of only one kind of atoms, We are given some list…

Q: (a) In the certain hydrated salt MSO34H2O, the mass percentage of H2O is 44.71%. Identify the…

A: The question is based on the concept of  Stoichiometry. we have been given a hydrate salt. we know…

Q: What is the mass of a single fluorine molecule, F2?

A: The mass of a molecule is the mass of all the atoms present in the molecule in grams. In order to…

Q: The radius of an atom of gold (Au) is about 1.35 Å. (a) Express this distance in nanometers (nm) and…

A: It is given that :Radius of gold atom = 1.35 Å

Q: A student has determined the mass-to-charge ratio for an electron to be 5.64 * 10^-12 kg/C. iN…

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Q: An element consists of two isotopes and has an average atomic weight of 85.561 a.m.u. The abundance…

A:

Q: Suppose that a hypothetical element con- sists of a mixture of two isotopes. One iso- tope, having…

A:

Q: On a planet in another galaxy, tellurium exists as only two isotopes, Te123 and Te130. The masses…

A: The average atomic mass of element can be calculated by adding the masses of the isotopes each…

Q: What does 1/5 have to do with this equation?     You take three compounds, each consisting of two…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: Which element would be expected to have chemical and physical properties closets to those nitrogen(N…

A: sulfur, because it's in the same groupGroups are columns of a periodic table. Both oxygen and sulfur…

Q: There are two naturally occurring isotopes of B- boron. One has an atomic mass of 10.013 amu and a…

A:

Q: 5- Atomic mass of aluminum is 27. Accordingly, which of the following statements is wrong? O A) The…

A: The wrong ans is 1st one

Q: Which of the following scenes illustrate(s) the fact that com-pounds of chlorine (green) and oxygen…

A: Given:-              Which of the following scenes illustrate(s) the fact that com-pounds of…

Q: Suppose instead of burning Mg, pure carbon weighing 3.62, 5.91, and 7.07 g were burned in an excess…

A: The Law of Definite proportion state that The same mass ratio is possessed by the elemental…

Q: Copper has 2 stable isotopes, namely Cu-63 and Cu-65. The atomic masses of the said isotopes are…

A:

Q: In the ammonia (NH) molecule of the figure, the three hydrogen (H) atoms form an equilateral…

A: You can find the center of mass of the 3 Hs first, then find the center of mass between that point…

Q: compound M2O3 is 30.06% oxygen, where M is an unknow metal. The element represented by M is?

A:

Q: Iodine (I) and fluorine (F) form a series of binary compounds with the following…

A: (a)

Q: Determine the mass (in grams) of exactly 100 millionatoms of fluorine if the relative atomic mass of…

A: To solve this  firstly calculate the mass of one fluorine atom. Relative atomic mass is mass of 1…

Q: Sort the characteristic properties of the following isotopes of nitrogen into their respective bins.

A:

Q: To which classes of matter—element, compound, and/ormixture—do the following apply: (a) law of mass…

A: The law of conservation of mass deals with the conservation of matter and law of definite…

Q: Write a symbol of an unknown or hypothetical element, then put on the proper place its atomic number…

A:

Q: Thallium has two stable isotopes, 203TIand 205TI. Knowing that the atomic weight of thallium is…

A:

Q: Iron exists in nature as a mixture of predominantly three isotopes: 54, (53.94 amu), 5® 26FE (55.93…

A:

Q: (a) In the certain hydrated salt MSO3⋅4H2O, the mass percentage of H2O is 44.71%. Identify the…

A: Hydrated Salt -  It is a crystalline salt to which water molecules are loosely bound.  Molar mass of…

Q: The ratio for an mass-to-charge electron is 5.64x10−12 kg/C. In another experiment, using Millikan's…

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Q: A hypothetical element has only 3 isotopes, with the following masses: Isotope 1:  44.98 u Isotope…

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Q: The natural abundance of 3He is 0.000137%. (a) How manyprotons, neutrons, and electrons are in an…

A: a. The number of protons = 2  The number of electrons = 2 and  The number of neutrons = 3-2 = 1

Q: Which of the following compounds would contain 12 atoms of oxygen? Assume that the all numbers…

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Q: One of the heaviest atoms found in nature is 238U. Its relativeatomic mass is 238.0508 on a scale in…

A: Given, 238U relative atomic mass is 238.0508

Q: The anticancer drug Platinol (Cisplatin), Pt(NH₃)₂Cl₂,reacts with the cancer cell’s DNA and…

A: The amount of a particular compound present in a solution is expressed by the various concentration…

Q: The elements of group 4A show an interesting change in properties moving down the group. Give the…

A: The name and chemical symbol of each element in the group 4A is to be given and label it as a…

Q: There are two isotopes of an unknown element, X-19 and X-21. The abundance of X-19 is 10.93%. Now…

A:

Q: potassium has three stable isotopes k-39, k-40 and k-41 but k-40 has a very low natural abundance.…

A: K  has 26 number of possible isotopes from 31K to 57K but among them only three are stable isotopes…

Q: If a row of approximately 5.0 x 107 atoms measured 1.0 cm, how long would a row of 6.02 × 1023 atoms…

A: Given is row of atoms, 1.0 cm = 5.0×107 atoms 6.02×1023 atoms = ?

Q: State the mass law(s) demonstrated by the following experi-mental results, and explain your…

A: The mass laws helps to predict the amount of product formed.

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.