Textbook Question
Identify the three elements indicated on the periodic table, and give the group that they are in.
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Ch.2 - Atoms, Molecules & Ions
McMurry8th EditionChemistryISBN: 9781292336145
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Table of contents
- Ch.1 - Chemical Tools: Experimentation & Measurement170
- Ch.2 - Atoms, Molecules & Ions160
- Ch.3 - Mass Relationships in Chemical Reactions169
- Ch.4 - Reactions in Aqueous Solution199
- Ch.5 - Periodicity & Electronic Structure of Atoms102
- Ch.6 - Ionic Compounds: Periodic Trends and Bonding Theory92
- Ch.7 - Covalent Bonding and Electron-Dot Structures61
- Ch.8 - Covalent Compounds: Bonding Theories and Molecular Structure59
- Ch.9 - Thermochemistry: Chemical Energy122
- Ch.10 - Gases: Their Properties & Behavior155
- Ch.11 - Liquids & Phase Changes54
- Ch.12 - Solids and Solid-State Materials73
- Ch.13 - Solutions & Their Properties120
- Ch.14 - Chemical Kinetics98
- Ch.15 - Chemical Equilibrium125
- Ch.16 - Aqueous Equilibria: Acids & Bases110
- Ch.17 - Applications of Aqueous Equilibria147
- Ch.18 - Thermodynamics: Entropy, Free Energy & Equilibrium86
- Ch.19 - Electrochemistry154
- Ch.20 - Nuclear Chemistry96
- Ch.21 - Transition Elements and Coordination Chemistry156
- Ch.22 - The Main Group Elements187
- Ch.23 - Organic and Biological Chemistry51
Chapter 2, Problem 36
The element indicated on the following periodic table is used in smoke detectors. Identify it, give its atomic number, and tell what kind of group it's in.
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Identify the element used in smoke detectors, which is Americium (Am).
Locate Americium on the periodic table to find its atomic number.
Americium is found in the actinide series, which is part of the f-block of the periodic table.
The atomic number of Americium is 95.
Americium belongs to the group of actinides, which are typically radioactive elements.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Periodic Table
The periodic table is a systematic arrangement of elements based on their atomic number, electron configuration, and recurring chemical properties. Elements are organized into rows (periods) and columns (groups), with each group containing elements that share similar characteristics. Understanding the layout of the periodic table is essential for identifying elements and their properties.
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Periodic Table Classifications
Atomic Number
The atomic number of an element is the number of protons found in the nucleus of its atoms, which determines the element's identity and its position on the periodic table. It also indicates the number of electrons in a neutral atom, influencing the element's chemical behavior. For example, the atomic number of the element used in smoke detectors, which is typically Americium (Am), is 95.
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Element Groups
Elements in the periodic table are categorized into groups based on their similar chemical properties. For instance, the group that Americium belongs to is the actinides, which are known for their radioactive properties. Understanding the group classification helps predict the behavior of elements in chemical reactions and their applications, such as in smoke detectors.
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Related Practice
Textbook Question
Would you expect these elements to have similar or different chemical reactivity?
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Name at least one other element that is chemically similar to the green element.
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What is the atomic number of the blue element?
Textbook Question
What is the group number of the green, blue, and red elements?
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Textbook Question
Classify these elements as metals, nonmetals, or semimetals.
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