• The mass of an electron is 9.1 × 10– 28 g. A) 1.0 × 10–13 m B) 1.0 × 10–10 m C) 1.0 × 10–7 m D) 1.0 m Ans: B 4. When photons with a wavelength of 310. nm strike a magnesium plate, the maximum velocity of the ejected electrons is 3.45 × 105 m/s. Calculate the binding energy of electrons to the magnesium surface.
  • Suppose that a stable element with atomic number 1 19, symbol Q , has been discovered. (a) Write the ground-state electron configuration for Q , showing only the valence-shell electrons. One point is earned for the electron configuration. (b) Would Q be a metal or a nonmetal? Explain in terms of electron configuration.
  • The electrons are shown as dots and crosses to show how they have moved during the reaction. In reality all electrons are identical. The balanced chemical equation for the above reaction is. sodium + chlorine sodium chloride. 2Na (s) + Cl 2(g) 2NaCl (s) Sodium chloride is a crystalline ionic compound.
  • The energy needed to remove the most loosely attached 1 mole electron of an isolated gaseous 1 mole atom to form one mole cation. That implies that 1 mole electrons from 1 mole metal must be removed from the energy. The gaseous state of the 1 mole metal. We can write a general equation to describe the removal of an electron from the metal.
  • The electron configuration of an atom describes the orbitals occupied by electrons on the atom. The basis of this prediction is a rule known as the Aufbau principle, which assumes that electrons are added to an atom, one at a time, starting with the lowest energy orbital, until all of the electrons have been placed in an appropriate orbital.
  • Electron binding energies for chlorine. All values of electron binding energies are given in eV. The binding energies are quoted relative to the vacuum level for rare gases and H 2 , N 2 , O 2 , F 2 , and Cl 2 molecules; relative to the Fermi level for metals; and relative to the top of the valence band for semiconductors.
  • <p>An element that is not combined with any other different elements has an oxidation state of 0. Under standard conditions, it is the lightest metal and the lightest solid element. Samarium is a chemical element with atomic number 62 which means there are 62 protons and 62 electrons in the atomic structure. </p> <p>In the following table the atoms of each functional group are colored ...
  • Therefore the sodium electron configuration will be 1s 2 2s 2 2p 6 3s 1. Video: Sodium Electron Configuration Notation The configuration notation provides an easy way for scientists to write and communicate how electrons are arranged around the nucleus of an atom.

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Answer: - The electronic configuration of Cd²⁺ = 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰. Explanation Question 2 (Matching Worth 4 points) (03.01 LC) Match each element to the number of electrons in its valence shell. Match Term Definition Chlorine (CI … )
In this video we will write the electron configuration for Cl-, the Chloride ion. We’ll also look at why Chlorine forms a 1- ion and how the electron configu...

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For example, since sodium (Na) normally has 11 electrons, it will have 10 electrons once it loses one. You should then write the electron configuration for 10 electrons. For Si and Ge, write both electron configurations. Look for patterns in the electron configurations from before the reactions and after the reactions.
Chlorine was discovered by Carl William Scheele (SE) in 1774. The origin of the name comes from the Greek word chloros meaning pale green.It is a greenish-yellow, disagreeable gas with irritating odour.

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Electronic configuration of Na+ is : 2,8 ( as it lost one electron to complete its valence shell ). Explanation: Na+ means it's number of electron is 11-1=10. And Cl- it's number of electrons is 17+1=18.
Electronic Configuration Another way 1 H 1s 1 K1. 2. He. 1s 2. K2. 3. Li [He] 2s 1. K2 L1. 4. Be [He] 2s 2. K2 L2. 5. B [He] 2s 2 2p 1. K2 L3. 6. C [He] 2s 2 2p 2. K2 L4. 7. N [He] 2s 2 2p 3. K2 L5. 8. O [He] 2s 2 2p 4. K2 L6. 9. F [He] 2s 2 2p 5. K2 L7. 10. Ne [He] 2s 2 2p 6. K2 L8. 11. Na [Ne] 3s 1. K2 L8 M1. 12. Mg [Ne] 3s 2. K2 L8 M2. 13 ...