Atomic Numbers and Electron Configurations

Question 1

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

Revolt · Accepted Answer

A box contains an upward pointing and a downward pointing arrow.

Question 2

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

Revolt · Accepted Answer

0, 1, 2

Question 3

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

Revolt · Accepted Answer

the distribution of electrons in different shells

Question 4

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?

Revolt · Accepted Answer

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

Question 5

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

Revolt · Accepted Answer

4

Question 6

Which is the electron configuration for boron?

Revolt · Accepted Answer

1s22s22p1

Question 7

Consider the electron configuration. 1s 2s 2p 3s 3p Which element has this electron configuration?

Revolt · Accepted Answer

chlorine

Question 8

Which is the electron configuration for zinc?

Revolt · Accepted Answer

1s22s22p63s23p64s23d10

Question 9

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?

Revolt · Accepted Answer

Both models because each shows an electron in the outermost shell.

Question 10

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

Revolt · Accepted Answer

1s22s22p3

Atomic Numbers and Electron Configurations Answers

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