객관식
Which group of elements on the periodic table is known for not reacting (or reacting only very rarely) with other elements under normal conditions?
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4. Atoms and Elements
Periodic Table: Group Names
1:31분문제 5
교과서 질문
Locate aluminum in the periodic table and give its group number and period number.
검증된 단계별 안내1
Identify the element 'aluminum' on the periodic table by its chemical symbol 'Al'.
Locate the position of aluminum in the periodic table by finding its atomic number, which is 13.
Determine the group number by identifying the vertical column in which aluminum is located. Aluminum is in group 13.
Determine the period number by identifying the horizontal row in which aluminum is located. Aluminum is in period 3.
Summarize the findings: Aluminum is located in group 13 and period 3 of the periodic table.
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1m주요 개념
질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.
Periodic Table Structure
The periodic table is organized into rows called periods and columns known as groups. Each element's position reflects its atomic number and properties. Elements in the same group share similar chemical behaviors, while periods indicate the number of electron shells.
추천 영상:
가이드 코스
02:40
Periodic Table: Classifications
Group Number
The group number of an element indicates its column in the periodic table, which corresponds to the number of valence electrons in its outer shell. For example, elements in Group 13, like aluminum, have three valence electrons, influencing their reactivity and bonding characteristics.
추천 영상:
가이드 코스
03:13Calculate Oxidation Numbers
Period Number
The period number of an element represents the row in which it is located on the periodic table, indicating the number of electron shells surrounding the nucleus. For aluminum, which is in Period 3, this means it has three electron shells, affecting its size and energy levels.
추천 영상:
가이드 코스
02:42Calculate Oxidation Numbers
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