valence electron and lewis dot structure
write the group number and the number of valence electrons for the given elements. then, draw the lewis structure and indicate how many electrons are gained or lost by that element to complete the outermost orbit.

| element | group number | number of valence electrons | lewis structure | number of electrons gained or lost |
| :--- | :--- | :--- | :--- | :--- |
| hydrogen | | | | |
| beryllium | | | | |
| boron | | | | |
| nitrogen | | | | |
| oxygen | | | | |
| chlorine | | | | |
| calcium | | | | |
| aluminum | | | | |
| bromine | | | | |
| sulfur | | | | |

Question

valence electron and lewis dot structure
write the group number and the number of valence electrons for the given elements. then, draw the lewis structure and indicate how many electrons are gained or lost by that element to complete the outermost orbit.

Accepted Answer

{ "quality": "clear", "question_count": 1, "skills_matched": [ "step_cot", "table_formatter", "explain_then_answer", "tutor", "mastery_adaptive_brevity" ], "needs_drawing": false, "concepts_used": [ "Group Numbers", "Valence Electrons", "Lewis Dot Diagrams", "Ion Formation" ], "new_concepts": [], "current_concepts": [ "Group Numbers", "Valence Electrons", "Lewis Dot Diagrams", "Ion Formation", "Octet Rule" ] } ## Determine group numbers and valence electrons Using the *Group Numbers* and *Valence Electrons* knowledge points $$ \begin{aligned} &\text{Hydrogen (H): Group 1 (or 1A)} \implies 1 \text{ valence electron}\ &\text{Beryllium (Be): Group 2 (or 2A)} \implies 2 \text{ valence electrons}\ &\text{Boron (B): Group 13 (or 3A)} \implies 3 \text{ valence electrons}\ &\text{Nitrogen (N): Group 15 (or 5A)} \implies 5 \text{ valence electrons}\ &\text{Oxygen (O): Group 16 (or 6A)} \implies 6 \text{ valence electrons}\ &\text{Chlorine (Cl): Group 17 (or 7A)} \implies 7 \text{ valence electrons}\ &\text{Calcium (Ca): Group 2 (or 2A)} \implies 2 \text{ valence electrons}\ &\text{Aluminum (Al): Group 13 (or 3A)} \implies 3 \text{ valence electrons}\ &\text{Bromine (Br): Group 17 (or 7A)} \implies 7 \text{ valence electrons}\ &\text{Sulfur (S): Group 16 (or 6A)} \implies 6 \text{ valence electrons} \end{aligned} $$ ## Represent Lewis dot structures Using the *Lewis Dot Diagrams* knowledge point $$ \begin{aligned} &\text{H}: \text{H}\cdot\ &\text{Be}: \cdot\text{Be}\cdot\ &\text{B}: \cdot\dot{\text{B}}\cdot\ &\text{N}: \cdot\ddot{\text{N}}\cdot\ &\text{O}: \cdot\ddot{\text{O}}: \text{ or } :\dot{\text{O}}\cdot\ &\text{Cl}: :\ddot{\text{Cl}}\cdot\ &\text{Ca}: \cdot\text{Ca}\cdot\ &\text{Al}: \cdot\dot{\text{Al}}\cdot\ &\text{Br}: :\ddot{\text{Br}}\cdot\ &\text{S}: :\ddot{\text{S}}\cdot \end{aligned} $$ ## Determine electrons gained or lost Using the *Ion Formation* knowledge point $$ \begin{aligned} &\text{H}: \text{Gains } 1 \text{ electron (to complete duet of } 2\text{) or loses } 1 \text{ electron}\ &\text{Be}: \text{Loses } 2 \text{ electrons}\ &\text{B}: \text{Loses } 3 \text{ electrons}\ &\text{N}: \text{Gains } 3 \text{ electrons}\ &\text{O}: \text{Gains } 2 \text{ electrons}\ &\text{Cl}: \text{Gains } 1 \text{ electron}\ &\text{Ca}: \text{Loses } 2 \text{ electrons}\ &\text{Al}: \text{Loses } 3 \text{ electrons}\ &\text{Br}: \text{Gains } 1 \text{ electron}\ &\text{S}: \text{Gains } 2 \text{ electrons} \end{aligned} $$ | Element | Group number | Number of valence electrons | Lewis structure | Number of electrons gained or lost | | :--- | :--- | :--- | :--- | :--- | | **Hydrogen** | 1 (1A) | 1 | $\text{H}\cdot$ | Gain 1 (or lose 1) | | **Beryllium** | 2 (2A) | 2 | $\cdot\text{Be}\cdot$ | Lose 2 | | **Boron** | 13 (3A) | 3 | $\cdot\dot{\text{B}}\cdot$ | Lose 3 | | **Nitrogen** | 15 (5A) | 5 | $\cdot\ddot{\text{N}}\cdot$ | Gain 3 | | **Oxygen** | 16 (6A) | 6 | $:\ddot{\text{O}}\cdot$ | Gain 2 | | **Chlorine** | 17 (7A) | 7 | $:\ddot{\text{Cl}}\cdot$ | Gain 1 | | **Calcium** | 2 (2A) | 2 | $\cdot\text{Ca}\cdot$ | Lose 2 | | **Aluminum** | 13 (3A) | 3 | $\cdot\dot{\text{Al}}\cdot$ | Lose 3 | | **Bromine** | 17 (7A) | 7 | $:\ddot{\text{Br}}\cdot$ | Gain 1 | | **Sulfur** | 16 (6A) | 6 | $:\ddot{\text{S}}\cdot$ | Gain 2 | { "subject": "Natural Science", "question_type": "Fill-in-the-blank", "knowledge_point": [ "Natural Science", "Chemistry", "Valence Electrons and Lewis Dot Structures" ] }

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QUESTION IMAGE

Question

Explanation:

Determine group numbers and valence electrons

Represent Lewis dot structures

Determine electrons gained or lost

Answer:

element	group number	number of valence electrons	lewis structure	number of electrons gained or lost
beryllium
boron
nitrogen
oxygen
chlorine
calcium
aluminum
bromine
sulfur

Element	Group number	Number of valence electrons	Lewis structure	Number of electrons gained or lost
Beryllium	2 (2A)	2	\(\cdot\text{Be}\cdot\)	Lose 2
Boron	13 (3A)	3	\(\cdot\dot{\text{B}}\cdot\)	Lose 3
Nitrogen	15 (5A)	5	\(\cdot\ddot{\text{N}}\cdot\)	Gain 3
Oxygen	16 (6A)	6	\(:\ddot{\text{O}}\cdot\)	Gain 2
Chlorine	17 (7A)	7	\(:\ddot{\text{Cl}}\cdot\)	Gain 1
Calcium	2 (2A)	2	\(\cdot\text{Ca}\cdot\)	Lose 2
Aluminum	13 (3A)	3	\(\cdot\dot{\text{Al}}\cdot\)	Lose 3
Bromine	17 (7A)	7	\(:\ddot{\text{Br}}\cdot\)	Gain 1
Sulfur	16 (6A)	6	\(:\ddot{\text{S}}\cdot\)	Gain 2