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Concept explainers
(a)
Interpretation:
Whether magnesium-25 and
Concept Introduction:
If the reaction occurs in the nucleus of an atom then it is known as nuclear reaction. These reactions are not considered as ordinary
The isotopes are designated to describe different atoms of the same element. To represent a nuclide various notations are used. All notation uses mass number and atomic number or mass number alone. Three types of notations are used. For example, nitrogen atom that contains mass number as 15 is designated as
(b)
Interpretation:
Whether Si-29 and
Concept Introduction:
If the reaction occurs in the nucleus of an atom then it is known as nuclear reaction. These reactions are not considered as ordinary chemical reactions because the electrons do not take part in reaction while the particles inside the nucleus does. Isotope and nuclide are almost similar terms. Isotopes refer to the same element that have different mass number while nuclide refer to atom of same or different elements with specific atomic number and same mass number.
The isotopes are designated to describe different atoms of the same element. To represent a nuclide various notations are used. All notation uses mass number and atomic number or mass number alone. Three types of notations are used. For example, nitrogen atom that contains mass number as 15 is designated as
(c)
Interpretation:
Whether Argon-40 and Ar-40 denote the same nuclide or not has to be indicated.
Concept Introduction:
If the reaction occurs in the nucleus of an atom then it is known as nuclear reaction. These reactions are not considered as ordinary chemical reactions because the electrons do not take part in reaction while the particles inside the nucleus does. Isotope and nuclide are almost similar terms. Isotopes refer to the same element that have different mass number while nuclide refer to atom of same or different elements with specific atomic number and same mass number.
The isotopes are designated to describe different atoms of the same element. To represent a nuclide various notations are used. All notation uses mass number and atomic number or mass number alone. Three types of notations are used. For example, nitrogen atom that contains mass number as 15 is designated as
(d)
Interpretation:
Whether Br-35 and (35 protons + 35 neutrons) denote the same nuclide or not has to be indicated.
Concept Introduction:
If the reaction occurs in the nucleus of an atom then it is known as nuclear reaction. These reactions are not considered as ordinary chemical reactions because the electrons do not take part in reaction while the particles inside the nucleus does. Isotope and nuclide are almost similar terms. Isotopes refer to the same element that have different mass number while nuclide refer to atom of same or different elements with specific atomic number and same mass number.
The isotopes are designated to describe different atoms of the same element. To represent a nuclide various notations are used. All notation uses mass number and atomic number or mass number alone. Three types of notations are used. For example, nitrogen atom that contains mass number as 15 is designated as
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Chapter 11 Solutions
EBK GENERAL, ORGANIC, AND BIOLOGICAL CH
- Smoke detectors in homes and apartments contain Am-241, which undergoes alpha decay. What is the abbreviated symbol of the "daughter nuclide" produced in the nuclear reaction? Hint: atomic number of Am is 95. A. a particle B. Pu-237 C. Am-237 D. He - 4 Е. Np-237arrow_forwardCompound A has molecular formula C7H7X. Its 1H-NMR spectrum shows a singlet at 2.25 ppm and two doublets, one at 7.28 ppm and one at 7.39 ppm. The singlet has an integral of three and the doublets each have an integral of two. The mass spectrum of A shows a peak at m/z = 126 and another peak at m/z = 128; the relative height of the two peaks is 3:1 respectively. Identify what atom X is, explaining your reasoning and identify Compound A, explaining your reasoning.arrow_forwardLook up the valence electron configuration, covalent atomic radius, effective nuclear charge, first ionization energy and Pauling electronegativity in Chapter 8 (tables are attached). Examine the above data and answer the following questions. a) Explain why some of the elements like TI and Pb on the lower left of the p block are metallic. b) Explain why some of the elements like C, Si in the center of the p block form covalent bonds. Explain why these bonds formed by the network of these elements (as studied in Chapter 25) tend to be unreactive. c) Explain why the noble Group 8A elements are highly unreactive gases. d) Explain why some elements like F, CI, Br etc, on the upper right of the p block are highly reactive nonmetals.arrow_forward
- Determine the mass in grams of 6.42 × 10²¹ atoms of carbon. (The mass of one mole of carbon is 12.01 g.)arrow_forwardA principal shell with a value of n=3 would contain s,p,d, and f orbitals true or falsearrow_forwardDetermine the mass in grams of 2.10 × 10²¹ atoms of copper. (The mass of one mole of copper is 63.55 g.)arrow_forward
- Polonium is a rare element with 33 radioisotopes. The most common one, 210Po, has 82 protons and 128 neutrons. When 210Po decays, it emits an alpha particle, which is a helium nucleus (2 protons and 2 neutrons). 210Po decay is tricky to detect because alpha particles do not carry very much energy compared to other forms of radiation. They can be stopped by, for example, a sheet of paper or a few inches of air. This property is one reason why authorities failed to discover toxic amounts of 210Po in the body of former KGB agent Alexander Litvinenko until after he died suddenly and mysteriously in 2006. What element does an atom of 210Po decay into after it emits an alpha particle?arrow_forwardAn isotope of sodium (Na) has a mass number of 22. How many neutrons does it have? a. 11 b. 12 c. 22 d. 44arrow_forwardPolonium is a rare element with 33 radioisotopes. The most common one, 210Po, has 82 protons and 128 neutrons. When 210Po decays, it emits an alpha particle, which is a helium nucleus (2 protons and 2 neutrons). 210Po decay is tricky to detect because alpha particles do not carry very much energy compared to other forms of radiation. They can be stopped by, for example, a sheet of paper or a few inches of air. This property is one reason why authorities failed to discover toxic amounts of 210Po in the body of former KGB agent Alexander Litvinenko until after he died suddenly and mysteriously in 2006. What element does an atom of 210Po decay into after it emits an alpha particle?arrow_forward
- Polonium is a rare element with 33 radioisotopes. The most common one, P210o, has 84 protons and 126 neutrons. When P210o decays, it emits an alpha particle, which is a helium nucleus 2 protons and 2 neutrons. P210o decay is tricky to detect because alpha particles do not carry very much energy compared to other forms of radiation. For example, they can be stopped by a single sheet of paper or a few inches of air. That is one reason why authorities failed to discover toxic amounts of P210o in the body of former KGB agent Alexander Litvinenko until after he died suddenly and mysteriously in 2006. What element does an atom of P210o change into after it emits an alpha particle.arrow_forwardMagnesium has an atomic number of 12. Which of the following statements is true of a neutral magnesium atom? a. It has 12 protons, 12 electrons, and 12 neutrons. b. It has 12 protons, 12 electrons, and six neutrons. c. It has six protons, six electrons, and no neutrons. d. It has six protons, six electrons, and six neutrons.arrow_forwardWhat if there are a different number of Neutrons? Sometimes elements have a different number of neutrons than usual, so therefore have a different atomic mass. This is what we call an Isotope (a variant form of an element which has the same number of protons but a differing number of neutrons). Sometimes we’ll see Isotopes labeled with their new mass like this: 14C = this is Carbon 14. Notice it has a different mass than what is on your periodic table The average mass of all the isotopes is defined as an element’s Atomic Weight. Can you answer questions about these Isotopes? ELEMENT ATOMIC MASS NUMBER OF PROTONS NUMBER OF NEUTRONS 14C A B C 15N D E F 2H G H I Use your table to look up the number of protons, remember that never changes!arrow_forward
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