Textbook Question
Give the symbol of the element that has the
a. largest atomic size in Group 1A (1)
2
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Ch.4 Atoms and Elements
Timberlake13th EditionChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9780134421353
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Table of contents
- Ch.1 Chemistry in Our Lives11
- Ch.2 Chemistry and Measurements80
- Ch.3 Matter and Energy54
- Ch.4 Atoms and Elements51
- Ch.5 Nuclear Chemistry42
- Ch.6 Ionic and Molecular Compounds57
- Ch.7 Chemical Quantities and Reactions41
- Ch.8 Gases29
- Ch.9 Solutions51
- Ch.10 Acids and Bases and Equilibrium65
- Ch.11 Introduction to Organic Chemistry: Hydrocarbons78
- Ch.12 Alcohols, Thiols, Ethers, Aldehydes, and Ketones83
- Ch.13 Carbohydrates54
- Ch.14 Carboxylic Acids, Esters, Amines, and Amides90
- Ch.15 Lipids61
- Ch.16 Amino Acids, Proteins, and Enzymes84
- Ch.17 Nucleic Acids and Protein Synthesis83
- Ch.18 Metabolic Pathways and ATP Production67
Timberlake13th EditionChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9780134421353Not the one you use?Change textbook
Chapter 4, Problem 116b
Give the symbol of the element that has the
b. largest atomic size in Period 4
Verified step by step guidance1
Identify the elements in Period 4 of the periodic table. Period 4 includes elements from potassium (K) to krypton (Kr).
Recall the trend for atomic size across a period. Atomic size decreases from left to right across a period due to the increasing nuclear charge, which pulls the electrons closer to the nucleus.
Determine which element is located at the far left of Period 4. This element will have the largest atomic size because it has the fewest protons and the least effective nuclear charge pulling on its electrons.
Find the symbol of the element at the far left of Period 4. This element is potassium (K).
Conclude that the element with the largest atomic size in Period 4 is potassium (K).
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Atomic Size
Atomic size, or atomic radius, refers to the distance from the nucleus of an atom to the outermost shell of electrons. It generally increases down a group in the periodic table due to the addition of electron shells, while it decreases across a period from left to right due to increased nuclear charge, which pulls electrons closer to the nucleus.
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05:22
Atomic Theory
Periodic Table Trends
The periodic table exhibits specific trends in atomic size, ionization energy, and electronegativity. In Period 4, elements are arranged in order of increasing atomic number, and understanding these trends helps predict the properties of elements, including which has the largest atomic size based on its position in the period.
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00:38Periodic Trend: Metallic Character
Group vs. Period
In the periodic table, a group is a vertical column that contains elements with similar chemical properties, while a period is a horizontal row. Elements in the same group often have similar atomic sizes, but the largest atomic size in a specific period is typically found at the leftmost side, where the elements have fewer protons and a weaker pull on their outer electrons.
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05:33Periodic Table: Group Names
Related Practice
Textbook Question
Give the symbol of the element that has the
e. least metallic character in Group 4A (14)
Textbook Question
Give the symbol of the element that has the
e. most metallic character in Group 2A (2)
1
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Textbook Question
Why is the ionization energy of Cl lower than F, but higher than that of S?
1
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