Write symbols of three cations & three anions that are isoelectronic with neon:
ID: 521900 • Letter: W
Question
Write symbols of three cations & three anions that are isoelectronic with neon: (isoelectronic means having the same number of electrons) How many unpaired electrons are in the outer subshell of a Se atom? Which of the following ions are isoelectronic with noble gases? Underline them. Al^+ 3 Cu^+ Fe^+3 Sn^2 + Si^- 4 As^5 + N^- 3 What are the two transition metals (3d) that their experimental electron configurations are different from the excepted electron configurations? Write the ground state electron configurations for each. List all of the possible values of I (angular momentum), m_t (magnetic), and m_3 (spin) quantum numbers for the following values of n = 4 (the principal quantum number): What is the maximum number of electrons limited by these quantum numbers? Explain! a) n "= 2, 1 = 0, m_1 = 0 b) n = 3, 1 = 1, m_5 = 1/2 c) n = 5, m_1 = 1 Use the Rydberg equation to calculate the wavelength in nm of the light emitted when the electron in a hydrogen atom undergoes a transition from n = 6 to n = 2. Consult figure 1 to determine the color of light emitted.Explanation / Answer
18) the two transition metals are copper and chromium
Copper expected configuration : [Ar] 3d9 4s2, but it has configuration [Ar] 3d10 4s1
Chromium expected configuration : [Ar] 3d4 4s2, but it has configuration [Ar] 3d5 4s1
This is because the pairing energy in s-orbital is higher than filling the d-orbitals. half-filled and completely filled d-orbitals tend to have lower energy and are more stable.
19) For n = 4
l = (n - 1) = 3 such that l = 0, 1, 2, 3
ml = (2l + 1) = -3, -2, -1, 0, +1, +2, +3
ms = +1/2 and -1/2
20) Maximum number of electrons limited by,
a) n = 2, l = 0, ml = 0
Is 4 electron
b) n = 3, l = 1, m = 1/2
Is 14 electron
c) n = 5, ml = 1
Is 54 electrons
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