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Ch.2 - Atoms, Molecules, and Ions
Brown - Chemistry: The Central Science 14th Edition
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Brown 14th EditionCh.2 - Atoms, Molecules, and Ions문제 100
2장, 문제 100

From the following list of elements—Mg, Li, Tl, Pb, Se, Cl, Xe, Si, C—pick the one that best fits each description. Use each element only once: (a) an alkali metal, (b) an alkaline earth metal, (c) a noble gas, (d) a halogen, (e) a metalloidin group 14, (f) a nonmetal listed in group 14, (g) a metal that forms a 3+ ion, (h) a nonmetal that forms a 2- ion, (i) an element that is used as radiation shielding.

검증된 단계별 안내
1
Identify the group and properties of each element listed: Mg (Magnesium), Li (Lithium), Tl (Thallium), Pb (Lead), Se (Selenium), Cl (Chlorine), Xe (Xenon), Si (Silicon), C (Carbon).
Match each element to the appropriate category based on its properties and group in the periodic table: (a) Alkali metals are in Group 1, (b) Alkaline earth metals are in Group 2, (c) Noble gases are in Group 18, (d) Halogens are in Group 17, (e) Metalloids in Group 14 have properties between metals and nonmetals, (f) Nonmetals in Group 14 are typically found in the p-block, (g) Metals that form a 3+ ion are typically transition metals or post-transition metals, (h) Nonmetals that form a 2- ion are typically found in the oxygen group (Group 16), (i) Elements used for radiation shielding are typically heavy and dense.
Assign each element to the description based on the periodic table: (a) Li is an alkali metal, (b) Mg is an alkaline earth metal, (c) Xe is a noble gas, (d) Cl is a halogen, (e) Si is a metalloid in Group 14.
Continue assigning elements to descriptions: (f) C is a nonmetal in Group 14, (g) Tl is a metal that can form a 3+ ion, (h) Se is a nonmetal that forms a 2- ion, (i) Pb is commonly used as radiation shielding due to its density.
Verify that each element is used only once and that all descriptions have been correctly matched with an element.

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이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
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2m

주요 개념

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Periodic Table Groups

The periodic table is organized into groups (columns) that share similar chemical properties. For example, alkali metals are found in Group 1, alkaline earth metals in Group 2, halogens in Group 17, and noble gases in Group 18. Understanding these groups helps identify elements based on their reactivity and common characteristics.
추천 영상:
가이드 코스
05:33
Periodic Table: Group Names

Ionic Charges of Elements

Elements can form ions by gaining or losing electrons, resulting in positive or negative charges. Metals typically lose electrons to form positive ions (cations), while nonmetals gain electrons to form negative ions (anions). Recognizing the common ionic charges of elements is crucial for determining their behavior in chemical reactions.
추천 영상:
가이드 코스
07:38
Main Group Element Charges

Metalloids and Their Properties

Metalloids are elements that exhibit properties of both metals and nonmetals, typically found along the zig-zag line on the periodic table. They can conduct electricity moderately and are often used in semiconductors. Identifying metalloids is important for understanding their unique roles in chemical and physical processes.
추천 영상:
가이드 코스
03:37
Metalloid Properties
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교과서 질문

The first atoms of seaborgium (Sg) were identified in 1974. The longest-lived isotope of Sg has a mass number of 266. (a) How many protons, electrons, and neutrons are in an 266Sg atom?

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교과서 질문

The first atoms of seaborgium (Sg) were identified in 1974. The longest-lived isotope of Sg has a mass number of 266. (b) Atoms of Sg are very unstable, and it is therefore difficult to study this element's properties. Based on the position of Sg in the periodic table, what element should it most closely resemble in its chemical properties?

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교과서 질문

There are two different isotopes of bromine atoms. Under normal conditions, elemental bromine consists of Br2 molecules, and the mass of a Br2 molecule is the sum of the masses of the two atoms in the molecule. The mass spectrum of Br2 consists of three peaks: Mass (u) Relative Size 157.836 0.2569 159.834 0.4999 161.832 0.2431 (e) Calculate the abundances of the two isotopes. Calculate the abundance of the heavier isotope.

328
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교과서 질문

There are two different isotopes of bromine atoms. Under normal conditions, elemental bromine consists of Br2 molecules, and the mass of a Br2 molecule is the sum of the masses of the two atoms in the molecule. The mass spectrum of Br2 consists of three peaks: Mass (u) Relative Size 157.836 0.2569 159.834 0.4999 161.832 0.2431 (d) Determine the average atomic mass of a bromine atom

644
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교과서 질문

It is common in mass spectrometry to assume that the mass of a cation is the same as that of its parent atom. (b) What percentage of the mass of an 1H atom does the electron represent?

305
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