chemistry

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1 the mass of one mole of electron is ...... mg.
2 copper(I) ions contains .......... electrons in its 3rd orbitals
3 if both K and L shells of an atom are full,what is the total number of electrons contained in them?
4 what is maximum number of electrons which can be accommodated in them?

  • chemistry -

    The mass of 1e x 6.02E23 = ? Then change to mg.
    2. Cu = 1s2 2s2 2p6 3s2 3p6 3d10 4s1
    So remove the outside electron to make Cu^+ and it's 3d?
    3. We have what? 2 electrons in K shell and 8 in the second?
    4.Maximum number of electrons in a shell = 2N2

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