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Explore TopicChoose the Best Answer
A
atomic mass
B
atomic number
C
electron affinity
D
atomic radius
Understanding the Answer
Let's break down why this is correct
Answer
In the Periodic Table, elements are primarily organized by their atomic number, the number of protons in the nucleus. This number determines how many electrons orbit the nucleus, which in turn dictates how the element reacts with others. Because the atomic number increases from left to right and top to bottom, elements with similar numbers of valence electrons end up in the same column, showing similar chemical behavior. For example, sodium (atomic number 11) and potassium (atomic number 19) both have one valence electron, so they both readily form +1 ions. Thus, the atomic number is the key organizing principle that links structure to reactivity.
Detailed Explanation
It is the count of protons in the nucleus. Other options are incorrect because Many think heavier elements sit further right, but the table does not use weight; Electron affinity is the energy released when adding an electron.
Key Concepts
Periodic Table Structure
Atomic Number
Chemical Properties
Topic
Periodic Table Structure
Difficulty
hard level question
Cognitive Level
understand
Practice Similar Questions
Test your understanding with related questions
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Question 3Arrange the following steps in the correct order of how elements are organized in the Periodic Table: A) Elements are grouped based on similar properties, B) Elements are arranged in order of increasing atomic number, C) Elements are placed in rows called periods, D) Elements are categorized into columns known as groups.
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Question 4How does the position of an element in the periodic table correlate with its chemical reactivity?
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Question 5In the structure of the Periodic Table, elements are primarily organized by their __________, which influences their chemical behavior and properties.
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Question 6Which of the following statements accurately describe the structure of the Periodic Table? Select all that apply.
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Question 7How does the organization of the Periodic Table help predict the properties of elements?
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8
Question 8Arrange the following steps in the correct order of how elements are organized in the Periodic Table: A) Elements are grouped based on similar properties, B) Elements are arranged in order of increasing atomic number, C) Elements are placed in rows called periods, D) Elements are categorized into columns known as groups.
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