Periodic Table Organization
Explore the organization and trends of the periodic table, including groups, periods, and properties of elements.
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Periodic Table Organization
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Read each question carefully and answer to the best of your ability. Refer to your knowledge of the periodic table.
1. Which of the following best describes the organization of elements in the periodic table?
By atomic mass in ascending order.
By number of neutrons.
By atomic number in ascending order.
Randomly, with similar elements grouped.
2. Elements in the same group (column) of the periodic table share similar:
Atomic radii
Number of electron shells
Chemical properties
Melting points
3. The horizontal rows in the periodic table are called , and they indicate the number of electron .
4. Elements with atomic numbers 58-71 are known as the series, while elements with atomic numbers 90-103 are called the series.
5. Explain why Mendeleev's periodic table was revolutionary, even though it had some gaps.
6. Electronegativity generally increases from left to right across a period and decreases down a group.
True
False
7. The elements in Group 18 (noble gases) are highly reactive due to their full valence electron shells.
True
False
Match the term with its definition.
8. Group
a. Horizontal row of elements
9. Period
b. Vertical column of elements
10. Valence electrons
c. Electrons in the outermost shell
11. Consider the element box shown below. Identify the information represented by each labeled part (A, B, C, D).
A:
B:
C:
D:
12. Discuss the periodic trends of atomic radius, ionization energy, and electron affinity across a period and down a group. Provide a brief explanation for each trend.