1. For the element Tungsten (W) answer the following questions; a) Give its elec

Question

1. For the element Tungsten (W) answer the following questions; a) Give its electron configuration b) How many valence electrons does this element have c) How many core electrons does this element have d) If this element were to form an ion, would the ion be e) Compared to sulfur, would this atom be more or less f) Compared to sulfur, would this atom have a greater or g) Would this element in the ground state be diamagnetic h) Attempt to draw an energy diagram of only the last smaller or bigger than the neutral atom? metallic? lower ionization energy? or paramagnetic? three sublevels for this element. electrons bit) (That's the lines for orbitals and half arrows for

Explanation / Answer

a) The atomic no.of Tungsten (symbol W) is 74. Thus, its electronic configuration is [Xe] 4f145d46s2

b) No.of valence electrons in W are 6 (5d 6s)

c) Core electrons are the electrons in an atom that are not valence and that do not participate in bonding.

Thus, core electrons = total electrons - valence electrons = 74 (total electrons of W) - 6 = 68

d) If tungsten were to form an ion, it will gain electrons and form an anion. Size of anion is usually larger than the parent neutral atom since addition of electrons increases the electron-electron repulsions

e) As compared to sulfur, W is more metallic in nature (it is more electropositive)

f)As compared to S, W will have lower ionization energy. Ionization energy depends on size of the atom, screening and penetration effect of electrons. It increases with increasing atomic no.in a period and decreases from top to bottom in a group.

g) In its ground state, tungsten will be paramagnetic due to presence of unpaired electrons.

h) last three energy levels will have 32,12 and 2 electrons respectively

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