AnswersChemistry Honors AThe Structure of the Atom

Atomic Numbers and Electron Configurations Answers

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1
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Which is the electron configuration for bromine?

A
1s22s22p63s23p64s23d104p5
B
1s22s22p63s23p64s23d104p6
C
1s22s22p63s23p44s23d104p5
D
1s22s22p63s23p64s23d94p5
2
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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.
3

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
4

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
5

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

A
2
B
3
C
4
D
5
6

Which characteristic is given by the principal quantum number?

A
orbital size
B
orbital mass
C
orbital shape
D
orbital orientation
7

Which is the electron configuration for boron?

A
1s22s3
B
1s22s23s1
C
1s12s22p2
D
1s22s22p1
8

The electron configuration for magnesium is shown below.1s22s22p63s2Which diagram shows the correct distribution of electrons in the electron shells of a magnesium atom?

A
A gray circle labeled 3 P 4 N is surrounded by two concentric circles. The inner circle has gray dots at the north and south positions, and the outer circle has a dot at the north position.
Option A
B
A gray circle labeled 4 P 5 N is surrounded by two concentric circles. Each of the concentric circles has gray dots at the north and south positions.
Option B
C
A gray circle labeled 12 P 12 N is surrounded by three concentric circles. The innermost circle has gray dots at the north and south positions; the middle circle has eight gray dots equally spaced around the circle, with dots aligned with those in the inner circle; the outer circle has gray dots at the north and south positions.
Option C
D
A gray circle labeled 12 P 12 N is surrounded by three concentric circles. The innermost circle has gray dots at the north and south positions; the middle circle has eight gray dots equally spaced around the circle, with dots aligned with those in the inner circle; the outer circle has a gray dot at the north position.
Option D
9

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

Question illustration
A
1s22s22p2
B
1s22s22p3
C
1s22s22p4
D
1s22s22p5
10

Which is the electron configuration for zinc?

A
1s22s22p63s23p64s23d8
B
1s22s22p63s23p64s13d10
C
1s22s22p53s23p64s23d10
D
1s22s22p63s23p64s23d10

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