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

Atomic Numbers and Electron Configurations Answers

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Which is the electron configuration for bromine?

A
1s22s22p63s23p64s23d104p5
B
1s22s22p63s23p64s23d104p6
C
1s22s22p63s23p44s23d104p5
D
1s22s22p63s23p64s23d94p5
2
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Which is the electron configuration for boron?

A
1s22s3
B
1s22s23s1
C
1s12s22p2
D
1s22s22p1
3

Two representations of the distribution of electrons in the potassium atom are shown. Model 1 Model 2 1s22s22p63s23p64s1 Which model is useful in showing the reactivity of potassium?

Question illustration
A
Neither model is able to show the reactivity of potassium.
B
Model 1 because it shows an electron in the 4s orbital.
C
Model 2 because it shows an electron in the outermost ring.
D
Both models because each shows an electron in the outermost shell.
4

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
5

Which is the electron configuration for lithium?

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

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

Question illustration
A
1s22s22p2
B
1s22s22p3
C
1s22s22p4
D
1s22s22p5
8

If a shell can hold a maximum of 32 electrons, what is the value of n?

A
2
B
3
C
4
D
5
9

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
10

Which diagram shows a pair of electrons that have opposite spins?

A
A box contains an upward pointing and a downward pointing arrow.
Option A
B
A box contains an upward pointing arrow.
Option B
C
A box contains an upward pointing arrow.
Option C
D
A box contains two upward pointing arrows.
Option D

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