Atomic Numbers and Electron Configurations

Question 1

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 2

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

Revolt · Accepted Answer

Orbital notation shows the spin of the electrons.

Question 3

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

Revolt · Accepted Answer

1s22s22p3

Question 4

Which is the electron configuration for bromine?

Revolt · Accepted Answer

1s22s22p63s23p64s23d104p5

Question 5

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

Revolt · Accepted Answer

chlorine

Question 6

Which is the electron configuration for zinc?

Revolt · Accepted Answer

1s22s22p63s23p64s23d10

Question 7

Which characteristic is given by the principal quantum number?

Revolt · Accepted Answer

orbital size

Question 8

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 9

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

Revolt · Accepted Answer

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.

Question 10

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

Revolt · Accepted Answer

0, 1, 2

Atomic Numbers and Electron Configurations Answers

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