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An atom has electronic configuration 2, ...

An atom has electronic configuration 2, 8, 7.
What is the atomic number of this element?

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To find the atomic number of the element with the electronic configuration 2, 8, 7, we can follow these steps: ### Step-by-Step Solution: 1. **Understand Electronic Configuration**: The electronic configuration of an atom describes the distribution of electrons in its atomic orbitals. In this case, the configuration is given as 2, 8, 7. 2. **Calculate Total Electrons**: - The first shell can hold 2 electrons. ...
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An atom has electronic configuration 2, 8, 7. (a) What is the atomic number of this element? (b) To which of the following elements would it be chemically similar? (Atomic numbers are given in parentheses) N (7) F (9) P (15) Ar (18)

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Knowledge Check

  • The electronic configuration of an element with atomic number 64 is

    A
    `6s^(2) 5d^(1) 4f^(7)`
    B
    `6s^(2) 5d^(0) 4f^(8)`
    C
    `6s^(1) 5d^(0) 4f^(7)`
    D
    `6s^(1) 5d^(2) 4f^(7)`

  • The electronic configuration of an element with atomic number 24 is

    A
    `1s^2,2s^2,2p^6,3s^2,3p^6,3d^4,4s^2`
    B
    `1s^2,2s^2,2p^6,3s^2,3p^6,3d^10`
    C
    `1s^2,2s^2,2p^6,3s^2,3p^6,3d^6`
    D
    `1s^2,2s^2,2p^6,3s^2,3p^6,3d^5,4s^1`

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