Mastering Electron Configurations and Valence Electrons Quiz

1. Write the orbital diagram for nitrogen. Tell how many valence electrons this atom has.

10 valence electrons

2 valence electrons

8 valence electrons

5 valence electrons

Nitrogen has 5 valence electrons based on its electron configuration. The orbital diagram for nitrogen would show 2 electrons in the s orbital and 3 electrons in the p orbital.

Explanation

Nitrogen has 5 valence electrons based on its electron configuration. The orbital diagram for nitrogen would show 2 electrons in the s orbital and 3 electrons in the p orbital.

2. Write the orbital diagram for indium. Tell how many valence electrons this atom has.

3 valence electrons

1 valence electron.

5 valence electrons.

7 valence electrons.

Indium is in Group 13 of the periodic table, which means it has 3 valence electrons based on its electron configuration. The orbital diagram for indium will show the distribution of these 3 valence electrons.

Explanation

Indium is in Group 13 of the periodic table, which means it has 3 valence electrons based on its electron configuration. The orbital diagram for indium will show the distribution of these 3 valence electrons.

3. Write the electron configuration of palladium. Tell how many valence electrons this atom has.

1s22s22p63s23p64s24d82 valence electrons.

1s22s22p63s23p64s23d94p65s24d82 valence electrons.

1s22s22p63s23p64s2 valence electrons.

1s22s22p63s23p64s23d104p65s24d82 valence electrons

The correct electron configuration for palladium is 1s22s22p63s23p64s23d104p65s24d82, which has 2 valence electrons in the 5s orbital. The incorrect answers either do not account for the full electron shell configuration or misrepresent the number of valence electrons.

Explanation

The correct electron configuration for palladium is 1s22s22p63s23p64s23d104p65s24d82, which has 2 valence electrons in the 5s orbital. The incorrect answers either do not account for the full electron shell configuration or misrepresent the number of valence electrons.

4. Write the electron configuration of lead. Tell how many valence electrons this atom has.

1s22s22p63s23p64s23d104p65s24d105p66s2 valence electrons.

1s22s22p63s23p64s23d104p65s24d105p66s24f145d106p24 valence electrons

1s22s22p63s23p64s23d104p65s24d105p66s24f145d106s24 valence electrons.

1s22s22p53s23p64s23d104p65s24d105p66s24f145d106p24 valence electrons.

The electron configuration of lead is shown in the correct answer. Valence electrons are determined by the outermost shell of the electron configuration, hence the correct number of valence electrons for lead is 4.

Explanation

The electron configuration of lead is shown in the correct answer. Valence electrons are determined by the outermost shell of the electron configuration, hence the correct number of valence electrons for lead is 4.

5. Write the condensed electron configuration of uranium. Tell how many valence electrons this atom has.

[Rn]7s25f42 valence electrons

[Rn]7s23d105f4 2 valence electrons.

[Rn]7s25f36d2 6 valence electrons.

[Rn]6d17s25f4 4 valence electrons.

The correct condensed electron configuration of uranium is [Rn]7s25f4 with 2 valence electrons. Valence electrons are the electrons in the outermost shell of an atom.

Explanation

The correct condensed electron configuration of uranium is [Rn]7s25f4 with 2 valence electrons. Valence electrons are the electrons in the outermost shell of an atom.

6. What is the condensed electron configuration of radon and how many valence electrons does it have?

[Xe]6s14f75d86p8, 5 valence electrons

[Xe]6s24f146d105p6, 6 valence electrons

[Xe]6s24f145d106p7, 7 valence electrons

[Xe]6s24f145d106p68 valence electrons

The correct condensed electron configuration of radon is [Xe]6s24f145d106p6. Radon has 8 valence electrons, which can be determined by looking at the outermost energy level (the p-shell in this case) of the condensed electron configuration.

Explanation

The correct condensed electron configuration of radon is [Xe]6s24f145d106p6. Radon has 8 valence electrons, which can be determined by looking at the outermost energy level (the p-shell in this case) of the condensed electron configuration.