Determine the number of valence electrons in an atom of each element. b. Sr

검증된 단계별 안내

Step 1: Identify the element on the periodic table. Strontium (Sr) is in the second group (IIA) of the periodic table.

Step 2: The group number of an element in the periodic table can be used to determine the number of valence electrons. For elements in group IIA, they have 2 valence electrons.

Step 3: Therefore, an atom of Strontium (Sr) has 2 valence electrons.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

영상 길이:

37s

주요 개념

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

Valence Electrons

Valence electrons are the electrons located in the outermost shell of an atom. They play a crucial role in chemical bonding and reactions, as they are the electrons that can be gained, lost, or shared when atoms interact. The number of valence electrons can often be determined by an element's position in the periodic table.

Periodic Table

The periodic table organizes elements based on their atomic number and electron configuration. Elements in the same group (column) typically have the same number of valence electrons, which influences their chemical properties. For example, alkaline earth metals like strontium (Sr) are found in Group 2 and have two valence electrons.

Strontium (Sr)

Strontium is a chemical element with the symbol Sr and atomic number 38. It is classified as an alkaline earth metal, which means it has two valence electrons in its outermost shell. This characteristic contributes to its reactivity and the types of compounds it can form.