Textbook Question
Indicate if each of the following statements is true or false:
d. The proton and the electron have about the same mass.
1021
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Ch.4 Atoms and Elements
Timberlake14thChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9781292472249
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Table of contents
- Ch.1 Chemistry in Our Lives19
- Ch.2 Chemistry and Measurements80
- Ch.3 Matter and Energy53
- Ch.4 Atoms and Elements58
- Ch.5 Nuclear Chemistry42
- Ch.6 Ionic and Molecular Compounds57
- Ch.7 Chemical Quantities and Reactions38
- Ch.8 Gases30
- Ch.9 Solutions50
- Ch.10 Acids and Bases and Equilibrium64
- Ch.11 Introduction to Organic Chemistry: Hydrocarbons77
- Ch.12 Alcohols, Thiols, Ethers, Aldehydes, and Ketones82
- Ch.13 Carbohydrates54
- Ch.14 Carboxylic Acids, Esters, Amines, and Amides91
- Ch.15 Lipids61
- Ch.16 Amino Acids, Proteins, and Enzymes84
- Ch.17 Nucleic Acids and Protein Synthesis86
- Ch.18 Metabolic Pathways and ATP Production73
Timberlake14thChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9781292472249Not the one you use?Change textbook
Chapter 4, Problem 103c,d
Provide the following:
c. the atomic mass and symbol of the alkaline earth metal in Period 3
d. the atomic mass and symbol of the halogen with the fewest electrons
Verified step by step guidance1
Step 1: Identify the alkaline earth metals in the periodic table. These are elements in Group 2, characterized by having two valence electrons.
Step 2: Locate Period 3 in the periodic table. Periods are horizontal rows, and Period 3 contains elements with three electron shells.
Step 3: Find the alkaline earth metal in Period 3. This element will be in Group 2 and Period 3. Note its atomic symbol and atomic mass.
Step 4: Identify the halogens in the periodic table. These are elements in Group 17, characterized by having seven valence electrons.
Step 5: Determine the halogen with the fewest electrons. This will be the halogen with the smallest atomic number. Note its atomic symbol and atomic mass.
Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Alkaline Earth Metals
Alkaline earth metals are a group of elements found in Group 2 of the periodic table. They are characterized by having two electrons in their outermost shell, which makes them highly reactive, though less so than alkali metals. In Period 3, the alkaline earth metal is magnesium (Mg), which has an atomic mass of approximately 24.31 u.
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Halogens
Halogens are elements found in Group 17 of the periodic table, known for their high reactivity due to having seven electrons in their outer shell. The halogen with the fewest electrons is astatine (At), which has an atomic number of 85 and an atomic mass of about 210 u. Halogens typically form salts when they react with metals.
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Periodic Table
The periodic table is a systematic arrangement of elements based on their atomic number, electron configuration, and recurring chemical properties. It is organized into periods (horizontal rows) and groups (vertical columns), which helps predict the behavior of elements. Understanding the layout of the periodic table is essential for identifying elements and their properties, such as atomic mass and reactivity.
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