Name an element in the third period (row) of the periodic table with the following: a. three valence electrons

검증된 단계별 안내

1. The periodic table is organized into periods (rows) and groups (columns). The number of valence electrons an element has corresponds to its group number. For example, elements in group 1 have one valence electron, elements in group 2 have two valence electrons, and so on.

2. We are looking for an element in the third period (row) of the periodic table with three valence electrons. This means we are looking for an element in the third group of the periodic table.

3. The third period of the periodic table starts with sodium (Na) and ends with argon (Ar).

4. The third group in the third period of the periodic table is aluminum (Al).

5. Therefore, the element in the third period of the periodic table with three valence electrons is aluminum (Al).

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

영상 길이:

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Periodic Table Structure

The periodic table is organized into rows (periods) and columns (groups) based on atomic number and electron configuration. Elements in the same period have the same number of electron shells, while those in the same group share similar chemical properties due to their valence electron configurations.

Valence Electrons

Valence electrons are the outermost electrons of an atom and are crucial in determining how an element reacts chemically. The number of valence electrons influences an element's bonding behavior and its placement in the periodic table, particularly in relation to its group.

Elements in the Third Period

The third period of the periodic table includes the elements sodium (Na), magnesium (Mg), aluminum (Al), silicon (Si), phosphorus (P), sulfur (S), chlorine (Cl), and argon (Ar). Among these, aluminum (Al) is the only element with three valence electrons, making it a key example for the question.