What element is represented by the electron configuration1s^2 2s^2 2p^5 3s^2 3p^

Question

What element is represented by the electron configuration1s^2 2s^2 2p^5 3s^2 3p^2? What element is represented by the orbital diagram: Draw the orbital diagrams (box/line notation) for the following species: Mn^2+ Cu Write the electron configuration for the following elements and ions using spdf notation (without noble gas abbreviations): Cr Si Fe^2+ P^3- Write the electron configuration for the following elements and ions using noble gas spdf notation: Sn^2+ Br^- What are the possible values of the angular momentum quantum number (t) when n = 4? What are the possible values for the magnetic quantum number (m) when t = 2? In the ground state of selenium, how many electrons share the quantum number. n = 4 t = 2 List all the quantum numbers for each of the 9 electrons in fluorine. n l m_t m_s What are the possible quantum numbers for the last electron in zinc? N = t = m_t = m_s = Which element has the largest atomic radius? Na or Li Zr or La or Sb or S Which element has the smallest ionic radius? Na^+ or Mg^2+ Be^2+ or O^2- or F^- or S^2- Which element has the highest electron affinity (most negative Delta E)? Na or Cl Sr or Ba Which alkaline earth metal has the smallest atomic energy? Which halogen has the lowest electron affinity?

Explanation / Answer

1.

Atomic number = 2+2+6+2+3 = 15

The element is Phosphorous

2.

Atomic number = 2+2+6+2 = 12

Element is: Magnesium

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