3. Show that an atom with the configuration ns²np⁶ is spherically symmetrical. Is the same true of anatom with the configuration ns² np³ ?

4. Identify the elements that have the ground-state electronconfigurations: (a) [Ne]3s23p4, (b) [Kr]5s2, (c) [Ar]4s23d3, (d)[Kr]5s24d5, (e) [Kr]5s24d105p1, (f) [Xe]6s24f6

5. When radiation of 58.4 nm from a helium discharge lamp isdirected on a sample of krypton, electrons are ejected with avelocity of 1.59 x 10⁶ m s ^-1. The sameradiation ejects electrons from rubidium atoms with a velocity of2.45 x 10⁶ m s ^-1. What are the ionizationenergies (in eV) of the two elements?

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answer 3 An atom with the configuration ns2np6 is spherically symmetrical This is because the number of electrons in each energy level is equal and there is an equal number of electrons in each of the ... View the full answer