Interpretation: The type of emission should be explained when a nucleus exhibit the above or below the stability belt.
Concept introduction:
Alpha (
Alpha decay: it is a type of radioactive decay in which an atomic nucleus emits an alpha (
Unstable atomic nuclei with an excess of proton may undergo
It’s popularly called as positron (
Here proton is converted into a neutron, a positron, and an electron neutrino.
Neutron is a subatomic particle, and it’s denoted as
Neutron contains no net electric charge and mass slightly larger than proton.
Proton and neutrons constitute the nuclei.
Nuclear Belt of Stability:
Most elements have isotopes and by plotting we can identify whether isotope is stable or not
The plot shows only the stable isotopes, this graph is often called the Nuclear Belt of Stability. The plot indicates that lighter nuclides (isotopes) are most stable when the neutron/proton ratio is 1/1.

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Chapter 20 Solutions
CHEMISTRY:ATOMS FIRST (LL)>CUSTOM PKG.<
- Please sirrr soollveee these parts pleaseeee and thank youuuuuarrow_forwardIII O Organic Chemistry Using wedges and dashes in skeletal structures Draw a skeletal ("line") structure for each of the molecules below. Be sure your structures show the important difference between the molecules. key O O O O O CHON Cl jiii iiiiiiii You can drag the slider to rotate the molecules. Explanation Check Click and drag to start drawing a structure. Q Search X G ©2025 McGraw Hill LLC. All Rights Reserved. Terms of Use F 3 W C 3/5arrow_forward3. Use Kapustinskii's equation and data from Table 4.10 in your textbook to calculate lattice energies of Cu(OH)2 and CuCO3 (4 points)arrow_forward
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- 1. Using radii from Resource section 1 (p.901) and Born-Lande equation, calculate the lattice energy for PbS, which crystallizes in the NaCl structure. Then, use the Born-Haber cycle to obtain the value of lattice energy for PbS. You will need the following data following data: AH Pb(g) = 196 kJ/mol; AHƒ PbS = −98 kJ/mol; electron affinities for S(g)→S¯(g) is -201 kJ/mol; S¯(g) (g) is 640kJ/mol. Ionization energies for Pb are listed in Resource section 2, p.903. Remember that enthalpies of formation are calculated beginning with the elements in their standard states (S8 for sulfur). The formation of S2, AHF: S2 (g) = 535 kJ/mol. Compare the two values, and explain the difference. (8 points)arrow_forwardIn the answer box, type the number of maximum stereoisomers possible for the following compound. A H H COH OH = H C Br H.C OH CHarrow_forward7. Magnesium is found in nature in the form of carbonates and sulfates. One of the major natural sources of zinc is zinc blende (ZnS). Use relevant concepts of acid-base theory to explain this combination of cations and anions in these minerals. (2 points)arrow_forward
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