Skip to main content
Ch.8 - Periodic Properties of the Elements
Tro - Chemistry: A Molecular Approach 4th Edition
Tro4th EditionChemistry: A Molecular ApproachISBN: 9780134112831당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Tro 4th EditionCh.8 - Periodic Properties of the Elements문제 46d
8장, 문제 46d

Use the periodic table to determine the element corresponding to each electron configuration. d. [Kr] 5s2

검증된 단계별 안내
1
Identify the noble gas in the electron configuration. In this case, it is [Kr], which stands for Krypton.
Understand that the notation [Kr] represents the electron configuration of Krypton, which has 36 electrons. This configuration is the starting point for the element in question.
Note the additional electrons beyond the noble gas configuration. Here, '5s2' indicates there are two electrons in the 5s orbital.
Add the two electrons in the 5s orbital to the total number of electrons represented by Krypton. This gives you 36 (from Krypton) + 2 (from the 5s orbital) = 38 electrons.
Use the periodic table to find the element with an atomic number of 38. This element is Strontium (Sr).

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
3m
도움이 되었나요?

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 using a notation that indicates the energy levels and sublevels occupied by electrons. For example, the configuration [Kr] 5s² indicates that the element has a core of electrons similar to krypton, with two additional electrons in the 5s orbital.
추천 영상:
가이드 코스
01:33
Electron Configuration Example

Periodic Table

The periodic table organizes elements based on their atomic number, electron configurations, and recurring chemical properties. Elements in the same group often exhibit similar behaviors due to their similar valence electron configurations. Understanding the layout of the periodic table helps in identifying elements based on their electron configurations.
추천 영상:
가이드 코스
02:40
Periodic Table Classifications

Identifying Elements

To identify an element from its electron configuration, one must consider the total number of electrons, which corresponds to the atomic number. In the case of [Kr] 5s², krypton has 36 electrons, and the two additional electrons bring the total to 38, identifying the element as strontium (Sr), which has an atomic number of 38.
추천 영상:
가이드 코스
02:35
Elemental Forms of Elements
관련 실천
교과서 질문

Use the periodic table to determine each quantity. c. the number of 4p electrons in Br

480
views
교과서 질문

Use the periodic table to determine the element corresponding to each electron configuration. a. [Ar] 4s23d104p6 b. [Ar] 4s23d2 c. [Kr] 5s24d105p2

620
views
교과서 질문

Use the periodic table to determine each quantity. b. the number of 3d electrons in Cu d. the number of 4d electrons in Zr

540
views
1
rank
교과서 질문

Use the periodic table to write an electron configuration for each element. Represent core electrons with the symbol of the previous noble gas in brackets. c. Zr

841
views
1
rank
교과서 질문

Use the periodic table to write an electron configuration for each element. Represent core electrons with the symbol of the previous noble gas in brackets. a. P b. Ge c. I

585
views
교과서 질문

Use the periodic table to determine each quantity. a. the number of 2s electrons in Li

536
views