Write the group number and draw the Lewis symbol for each of the following elements:
e. gallium
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1
Identify the element gallium on the periodic table. Gallium is represented by the symbol 'Ga'.
Determine the group number for gallium. Gallium is located in Group 13 of the periodic table.
Understand that the group number for main group elements (Groups 1, 2, and 13-18) indicates the number of valence electrons. Therefore, gallium has 3 valence electrons.
Draw the Lewis symbol for gallium by writing the element symbol 'Ga' and surrounding it with three dots, representing the three valence electrons.
Arrange the dots around the symbol 'Ga' to reflect the valence electrons, typically placing one dot on each of the four sides before pairing them.
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주요 개념
질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.
Lewis Symbols
Lewis symbols, also known as Lewis dot diagrams, represent the valence electrons of an atom as dots surrounding the element's symbol. This visual representation helps in understanding how atoms bond with each other, as it shows the number of electrons available for bonding. For example, the Lewis symbol for gallium (Ga) will depict its three valence electrons, which are crucial for its chemical behavior.
Valence electrons are the electrons in the outermost shell of an atom and are key to determining how an element interacts chemically. The number of valence electrons influences an element's reactivity, bonding capacity, and placement in the periodic table. Gallium, with its three valence electrons, typically forms bonds by sharing or losing these electrons, which is essential for understanding its chemical properties.
Valence Electrons of Elements (Simplified) Concept 1
Periodic Table Group Number
The group number in the periodic table indicates the number of valence electrons for the elements in that column. Elements in the same group often exhibit similar chemical properties due to their comparable electron configurations. Gallium is located in group 13, which signifies that it has three valence electrons, influencing its bonding behavior and reactivity with other elements.