Answers26-27 WHS-Chemistry-1stSixWeeksAtomic Numbers and Electron Configurations

Atomic Numbers and Electron Configurations Answers

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Consider the model of a sodium atom.Which feature does the model show accurately?

Question illustration
A
the size of the electrons in different shells
B
the shapes of the orbitals in different shells
C
the distribution of electrons in different shells
D
the orientation of the orbitals in different shells
2
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Which is the electron configuration for lithium?

A
1s2
B
2s3
C
1s22s1
D
1s12s2
3

To show the electron configuration for an atom, what is the advantage of using an orbital notation compared to a dot structure?

A
Orbital notation takes up less space.
B
Orbital notation shows the spin of the electrons.
C
Orbital notation makes it easier to count the electrons.
D
Orbital notation shows the electron distribution in shells.
4

Consider the model of the nitrogen atom.Which electron configuration matches this model?

Question illustration
A
1s22s22p2
B
1s22s22p3
C
1s22s22p4
D
1s22s22p5
5

Which is the electron configuration for boron?

A
1s22s3
B
1s22s23s1
C
1s12s22p2
D
1s22s22p1
6

Which set of numbers gives the correct possible values of l for n = 3?

A
0, 1, 2
B
0, 1, 2, 3
C
–2, –1, 0, 1, 2
D
–3, –2, –1, 0, 1, 2, 3
7

Error

Answer not available
8

Each atom of an element has the following electron configuration.1s22s22p63s23p64s23d104p65s24d105p5What is the name of the element?

A
bromine
B
iodine
C
tellurium
D
xenon
9

Which characteristic is given by the principal quantum number?

A
orbital size
B
orbital mass
C
orbital shape
D
orbital orientation
10

The electron configuration for Helium (He) is shown below. 1s2 Which diagram shows the correct distribution of electrons in the electron shells of a helium atom?

A
A gray circle labeled 1 P 0 N is surrounded by a concentric circle with one gray dot at the north position.
Option A
B
A gray circle is labeled 5 P 6 N. It is surrounded by two concentric circles. The inner circle has gray dots at the north and south positions. The outer circle has three evenly spaced dots; none of these align with the dots in the inner circle.
Option B
C
A gray circle is labeled 2 P 2 N. A concentric circle surrounding it has two gray dots, at the north and south positions.
Option C
D
A gray circle is labeled 6 P 6 N is surrounded by two concentric circles. The inner circle has dots at the north and south positions; the outer circle has dots at the north, south, east, and west positions.
Option D

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