Answers NY-Chemistry Term 1 HillcrestAtomic 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?

the size of the electrons in different shells

the shapes of the orbitals in different shells

the distribution of electrons in different shells

the orientation of the orbitals in different shells

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Which is the electron configuration for lithium?

1s2

2s3

1s22s1

1s12s2

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

Orbital notation takes up less space.

Orbital notation shows the spin of the electrons.

Orbital notation makes it easier to count the electrons.

Orbital notation shows the electron distribution in shells.

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

1s22s22p2

1s22s22p3

1s22s22p4

1s22s22p5

Which is the electron configuration for boron?

1s22s3

1s22s23s1

1s12s22p2

1s22s22p1

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

0, 1, 2

0, 1, 2, 3

–2, –1, 0, 1, 2

–3, –2, –1, 0, 1, 2, 3

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

bromine

iodine

tellurium

xenon

Which characteristic is given by the principal quantum number?

orbital size

orbital mass

orbital shape

orbital orientation

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 gray circle labeled 1 P 0 N is surrounded by a concentric circle with one gray dot at the north position.

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.

A gray circle is labeled 2 P 2 N. A concentric circle surrounding it has two gray dots, at the north and south positions.

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.

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Atomic Numbers and Electron Configurations Answers

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