(a) True or false: An element's number of valence electrons is the same as its atomic number.

검증된 단계별 안내

Step 1: Understand the definition of atomic number. The atomic number of an element is the number of protons in the nucleus of an atom of that element.

Step 2: Understand the concept of valence electrons. Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

Step 3: Recognize that for main group elements, the number of valence electrons is often related to the group number in the periodic table, not the atomic number.

Step 4: Consider examples to illustrate the difference. For instance, carbon has an atomic number of 6, but it has 4 valence electrons.

Step 5: Conclude that the statement is false because the number of valence electrons is not the same as the atomic number.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

영상 길이:

도움이 되었나요?

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 varies among elements and is determined by the group number in the periodic table.

Atomic Number

The atomic number of an element is the number of protons found in the nucleus of its atoms. It uniquely identifies an element and determines its position in the periodic table. While the atomic number also indicates the number of electrons in a neutral atom, it does not directly correspond to the number of valence electrons, which can differ based on the element's group.

Periodic Table Groups

Elements in the periodic table are organized into groups based on similar chemical properties and the number of valence electrons. For example, elements in Group 1 have one valence electron, while those in Group 2 have two. Understanding these groupings helps predict how elements will react chemically, but it is important to note that the atomic number does not equal the number of valence electrons for most elements.