Match each element with its correct number of valence electrons. (Remember for the representative elements, (Groups 1A-8A), the group number tells you the number of valence electrons.)

Question

Sulfur (S) __________.

Krypton (Kr) _________.

Rubidium (Rb) _________.

Silicon (Si) ___________.


Nitrogen (N) ___________.

Radium (Ra) )__________.

Fluorine (F) ___________.

Thallium (Tl) ___________.

Choices: 8 valence electrons, 1 valence electron, 3 valence electrons, 4 valence electrons, 6 valence electrons, 2 valence electrons, 7 valence electrons. 5 valence electrons

choose the correct answers

Answer 1

Here are the correct numbers of valence electrons for each element based on their group number:

• Sulfur (S) - 6 valence electrons (Group 6A)

• Krypton (Kr) - 8 valence electrons (Group 8A, noble gas)

• Rubidium (Rb) - 1 valence electron (Group 1A)

• Silicon (Si) - 4 valence electrons (Group 4A)

• Nitrogen (N) - 5 valence electrons (Group 5A)

• Radium (Ra) - 2 valence electrons (Group 2A)

• Fluorine (F) - 7 valence electrons (Group 7A)

• Thallium (Tl) - 3 valence electrons (Group 3A)

So the matches are as follows:

• Sulfur (S) - 6 valence electrons
• Krypton (Kr) - 8 valence electrons
• Rubidium (Rb) - 1 valence electron
• Silicon (Si) - 4 valence electrons
• Nitrogen (N) - 5 valence electrons
• Radium (Ra) - 2 valence electrons
• Fluorine (F) - 7 valence electrons
• Thallium (Tl) - 3 valence electrons