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Chapter 40: Q4Q (page 1246)

An atom of uranium has closed 6pand 7ssub shells. Which sub shell has the greater number of electrons?

Short Answer

Expert verified

The sub shell 6p has a greater number of electrons.

Step by step solution

01

The given data

A uranium atom has closed 6p and 7s subshells.

02

Understanding the concept of maximum electrons in a shell

For an electronic configuration, the nucleus of an atom is surrounded by orbital sub-shells that are represented by s, p, d, and f. Again, the maximum electron filling capacity of s, p, d, and f are 2, 6, 10, and 14, respectively.

So, using this concept on a filled sub-shell of an atom of uranium, we can get the electrons in each shell.

03

Calculation of the sub shell with a greater number of electrons

From the concept of maximum electrons filled in each shell, we can get that a p(n = 2) subshell has a greater number of electrons than that of s(n =2) subshell.

Thus, for a completely filled sub-shell of uranium, the sub-shell has 6 electrons that that to sub-shell 7s with 2 electrons.

Hence, the sub-shell 6p has more electrons.

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Most popular questions from this chapter

Label these statements as true or false:

(a) One (and only one) of these sub shells cannot exist: 2p,4f,3d,1p

(b) The number of values ofml that are allowed depends on l and not on n.

(c) There are four sub shells for n = 4 .

(d) The smallest value of for a given value of l is l + 1 .

(e) All states with l = 0 also haveml=0 .

(f) There are n sub shells for each value of n .

Suppose two electrons in an atom have quantum numbers n = 2 and l = 1 . (a) How many states are possible for those two electrons? (Keep in mind that the electrons are indistinguishable.) (b) If the Pauli Exclusion Principle did not apply to the electrons, how many states would be possible?

From which atom of each of the following pairs is it easier to remove an electron:

(a) krypton or Bromine,

(b) rubidium or Cerium,

(c) helium or Hydrogen?

The active medium in a particular laser generates laser light at a wavelength of 694nm is 6.00 cm long and 1.00 cm in diameter. (a) Treat the medium as an optical resonance cavity analogous to a closed organ pipe. How many standing-wave nodes are there along the laser axis? (b) By what amount鈭�fwould the beam frequency have to shift to increase this number by one? (c) Show that 鈭�fis just the inverse of the travel time of laser light for one round trip back and forth along the laser axis. (d) What is the corresponding fractional frequency shift 鈭�f/f? The appropriate index of refraction of the lasing medium (a ruby crystal) is 1.75.

From Fig. 40-13, calculate approximately the energy difference EL-EMfor molybdenum. Compare it with the value that may be obtained from Fig. 40-15.
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