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In the periodic table, what are the horizontal rows called?
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4. Atoms and Elements
Periodic Table: Classifications
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Elements are organized on the modern periodic table primarily according to which property?
A
Increasing number of neutrons
B
Alphabetical order of element names
C
Increasing atomic number
D
Increasing atomic mass
Guida verificata passo dopo passo1
Understand that the modern periodic table arranges elements based on a fundamental property related to their atomic structure.
Recall that the atomic number of an element is the number of protons in its nucleus, which uniquely identifies each element.
Recognize that the periodic table is organized in order of increasing atomic number, not by the number of neutrons or atomic mass.
Note that while atomic mass was used in earlier versions of the periodic table, the modern table uses atomic number to avoid inconsistencies.
Conclude that the primary property for organizing elements on the modern periodic table is the increasing atomic number.
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