Atomic Numbers and Electron Configurations

Question 1

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 2

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 3

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 4

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

Revolt · Accepted Answer

iodine

Question 5

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

Revolt · Accepted Answer

chlorine

Question 6

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 7

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

Revolt · Accepted Answer

1s22s22p3

Question 8

Which is the electron configuration for boron?

Revolt · Accepted Answer

1s22s22p1

Question 9

Which is the electron configuration for zinc?

Revolt · Accepted Answer

1s22s22p63s23p64s23d10

Question 10

Which characteristic is given by the principal quantum number?

Revolt · Accepted Answer

orbital size

Atomic Numbers and Electron Configurations Answers

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