While the most common isotope of nitrogen has a mass number of 14 (nitrogen-14), a radioactive isotope of nitrogen has a mass number of 13 (nitrogen-13). Nitrogen-13 is used in PET (positron emission tomography) scans by physicians to monitor brain activity and diagnose dementia. For each isotope, give the following information: (a) the number of protons; (b) the number of neutrons; (c) the number of electrons in the neutral atom; (d) the group number; and (e) the number of valence electrons.

Q: 1 “Isobars” are isotopes of different elements having the same mass number. Write the isotopic…

A: The two isobars given are  1) K-40 2) Ca-40

Q: amino acid methionine is depicted in the picture.  C5H11NO2S is the molecular formula for…

A:

Q: What is the symbol (including the atomic number, mass number, and element symbol) for the oxygen…

A: Given that, 1) Isotope= Oxygen 2) 2145Sc

Q: Write the isotopic symbols in the form X-A (for example, C- 13) for the iodine isotope with 74…

A: Write the isotope for iodine with 74 neutrons

Q: On another planet, the isotopes of titanium have the given natural abundances. Isotope Abundance…

A: The term isotopes can be defined as the variants of a given chemical element that differ in neutron…

Q: An element X exists as two isotopes - 46X and 49X and weigh 45.95 amu and 48.95 amu, respectively.…

A: Given :-  Atomic wt.of 46X = 45.95 amu  Atomic wt.of 49X = 48.95 amu  Average atomic wt.of X = 46.66…

Q: Write the isotopic symbols in the form X-A (for example, C- 13) for the argon isotope with 22…

A: When the two Two has same no of proton but mass no is different then they are called is isotope of…

Q: 32. Americium­241 is used in household smoke detectors. This element has 11 known isotopes, none of…

A: Given  Atom = Americium - 241  Number of proton , neutron , electron = ?

Q: Ammonia is a gas with a characteristic pungent odor. It is sold as a water solution used in…

A: The atomic mass of N relative to H in a sample of of ammonia contains 7.933 g N and 1.712 g H, it is…

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

A: The formula for fractional abundance is, Fractional abundance=0.01×Abundance(%)

Q: 4. Lead 210 is a radioactive isotope of lead. It is a beta emitter. In the radioactive decay process…

A: We have to assume that each radioactive species has 82 electrons. No. Of electrons = No. Of protons…

Q: 2.89 In which one of the following pairs do the two species resemble each other most closely in…

A: The answer is option (c), which are C612 and C613. It is because, the chemical properties are the…

Q: Determine the number of protons and the number of neutrons in isotope. 20882Pb

A: In 20882Pb :

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

A:

Q: There are two naturally occurring isotopes of europium, 151Eu (151.0 amu) and 153EU (153.0 amu). If…

A: Given : There are 2 naturally occurring isotopes of europium. Mass of 151Eu = 151.0 amu Mass of…

Q: Determine the number of protons and neutrons in each of the following isotopes. 223 Rn 86 Express…

A: We can obtain the number of neutron upon subtracting mass number with number of protons.

Q: in nature, element X is found as a mixture of two isotopes, one with mass number 107 and the other…

A:

Q: Neodymium (Nd) is a rare earth metal that is extremely valuable. It is used in most electronics and…

A:

Q: 2. What is the relative abundance of each isotope present in a sample of Tin if the average atomic…

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Q: On another planet, the isotopes of titanium have the given natural abundances. Isotope 46TI…

A:

Q: Which of the following atoms has the same number of neutrons as ⁵⁹Ni?

A: ⁶⁰Cu has the same number of neutrons as ⁵⁹Ni

Q: 1. Calculate how many protons and neutrons are present in 14N, 15N and 16N.

A:

Q: On another planet, the isotopes of titanium have the given natural abundances. Isotope Abundance…

A: Titanium is an element which has symbol Ti and atomic number 22. Its atomic weight is 47.867 amu. It…

Q: What is the symbol for the isotope of 55Fe that possesses 31 neutrons? Express your answer as a…

A:

Q: Determine the number of protons and the number of neutrons in isotope. 99Tc43

A: General representation of an element - AXZ were, X = Symbol of an element. A = Mass number. Z =…

Q: The following table presents the abundances and masses of the isotopes of zinc. What is the atomic…

A: The abundance of the naturally occurring isotope given are,

Q: Elements of which of the following groups on the periodic table always occur naturally as monatomic…

A: The groups given are, A) Noble gases B) Halogens C) Chalcogens  D) Pinctogens E) Group 4 A (14)…

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: How many protons and neutrons are present in 118Sn4+?

A:

Q: Hydrogen has naturally occurring isotopes. Which of the following show the correct sequence of…

A: The natural abundance of isotopes oh hydrogen is as :-  Protium = 99.98%  Deuterium = 0.0026-0.0184%…

Q: 9.Which of the following elements is in Group 6B?   a, Cs b, Po c, O d, Mo 10,Which of the following…

A: 9. Out of the given elements, d, Molybednum(Mo) is in Group 6B of the periodic table. Molybednum is…

Q: C. What is the weight of ferrous sulfate FeSOa.7H: 0 should be taken to designate iron as ferric…

A: Recall the following reaction that will occur on heat of hydrated ferrous sulphate      FeSO4.7H2O…

Q: a) How many protons, electrons, and neutrons are in an 266 Sg atom? (atomic mass = 266) b) Atoms…

A: Elements are the species which consist of only one kind of atoms. In other words, species which…

Q: What is the Average atomic mass of an unknown element given its isotopes and their abundancies…

A:

Q: Consider Cr-54, Fe-54, Fe-58 and Ni-58 , which of this are isobars and which are isotopes

A:

Q: There are two naturally occurring isotopes of europium, 151Eu(151.0 amu) and 153Eu(153.0 amu). If…

A: Given information:Two isotopes of europium, 151Eu (151.0 amu) and 153Eu (153.0 amu)Atomic mass of Eu…

Q: The isotope carbon­11 does not occur in nature but has been made in the laboratory. This isotope is…

A: Given: The carbon isotope= C611

Q: Element X has two naturally occurring isotopes, 65X (isotopic mass 65.3520 amu, abundance 58.16%)…

A: The average atomic mass is the sum of the mass of the isotopes multiplied by its fraction or…

Q: Which of the highlighted elements in Figure P2.7 is (a) a reactive nonmetal, (b) a chemically inert…

A: Reactive metals exist in group 1 of the long form of periodic table. Group 1 is placed at the…

Q: 5. Gallium has two naturally occurring isotopes with the following masses and natural abundances.…

A: The average atomic mass of an element having isotopes can be calculated from the formula given…

Q: What aspect of an element does the number of neutrons solely determine? its mass its identity its…

A: Number of neutron fixed in an element

Q: Uranium hexafluoride, UF6, is an important compound used in the enrichment of uranium by gaseous…

A: Where uranium can be found on the periodic table ?

Q: What is the name of this element, and how many protons and neutrons does this isotope have in its…

A: The objective of the question is to write the name of the given element and to find the number of…

Q: On another planet, the isotopes of titanium have the given natural abundances. Isotope Abundance…

A:

Q: Hydrogen sulfide is a gas with the odor of rotten eggs. The gas can sometimes be detected in…

A:

Q: Calculate the number of protons, neutrons, and electrons in 15 g of Si-28. The isotope Si-28 has a…

A: The atomic number of an atom is the number of protons present in the atom. For a neutral atom, the…

Q: An element consists of 1.40% of an isotope with mass 203.9730 u, 24.10% of an isotope with mass…

A: Average atomic mass is the isotopic abundance (relative to each other found in the Earth). formula…

Q: 19 Which of the following statements is correct about one mole of ethane gas, C2H4 and one mole of…

A:

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

A: Fractional abundance can be calculated using the formula,

Group 14 Elements

The following elements come under group 14 of the periodic table.