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Ch.8 - Basic Concepts of Chemical Bonding
Brown - Chemistry: The Central Science 14th Edition
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Brown 14th EditionCh.8 - Basic Concepts of Chemical Bonding문제 9c
8장, 문제 9c

(c) An atom has the electron configuration 1s22s22p63s23p2. How many valence electrons does the atom have?

검증된 단계별 안내
1
Identify the highest principal quantum number (n) in the given electron configuration. This number indicates the outermost shell of the atom.
Locate the subshells (s, p, d, f) associated with the highest principal quantum number. In this case, look at the electrons in the 3s and 3p subshells.
Count the total number of electrons in these subshells. The number of electrons in these subshells represents the number of valence electrons.
Sum the electrons in the 3s and 3p subshells to find the total number of valence electrons.
The total number of electrons in the 3s and 3p subshells is the number of valence electrons the atom has.

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주요 개념

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

Electron Configuration

Electron configuration describes the distribution of electrons in an atom's orbitals. It is represented by a series of numbers and letters indicating the energy levels and types of orbitals occupied by electrons. Understanding electron configuration is essential for determining the chemical properties of an element, including its reactivity and bonding behavior.
추천 영상:
가이드 코스
01:33
Electron Configuration Example

Valence Electrons

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding. They determine how an atom interacts with other atoms and are crucial for understanding an element's reactivity. The number of valence electrons can be deduced from the electron configuration, particularly from the highest principal energy level.
추천 영상:
가이드 코스
02:12
Transition Metals Valence Electrons

Principal Energy Levels

Principal energy levels are the layers of electrons surrounding the nucleus of an atom, denoted by the principal quantum number (n). Each level can hold a specific number of electrons, and the outermost level contains the valence electrons. Identifying the principal energy levels helps in understanding the structure of the atom and predicting its chemical behavior.
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가이드 코스
02:55
Principal Quantum Number
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