Question

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.)


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**