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properties from left to right. However, the pattern of properties within a period repeats as you move from one period to the next. This pattern gives rise to the periodic law. What does the periodic law state and mean?

properties from left to right. However, the pattern of properties within a period repeats as you move from one period to the next. This pattern gives rise to the periodic law. What does the periodic law state and mean?

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Activity 4: Today's Periodic Table (Modern Periodic Table) Mendeleev developed his table before scientists knew about the structure of atoms. (He actually believed that atoms did not exist! Imagine what he would have thought when J.J. Thomson discovered the electron!!!) He did not know that the atoms of each element contained a unique number of protons. In 1913, a British physicist named Henry Moseley determined an atomic number for each known element. Tellurium's atomic number is 52 and iodine's is 53, so it makes sense for iodine to come after tellurium in the periodic table. In the modern periodic table, elements are arranged in order of increasing atomic number. The rows of the periodic table are called periods. Each period corresponds to a principal energy level (electron energy levels, i.e. 1, 2,.). There are more elements in higher-numbered periods because there are more electron orbitals (s, p, d, f) in higher energy levels. The properties of the elements within a period change as you move across a period from left to right. However, the pattern of properties within a period repeats as you move from one period to the next. This pattern gives rise to the periodic law. What does the periodic law state and mean? The columns of the periodic table are called groups. Elements that have similar chemical and physical properties end up in the same group or column in the periodic table.
Transcribed Image Text:Activity 4: Today's Periodic Table (Modern Periodic Table) Mendeleev developed his table before scientists knew about the structure of atoms. (He actually believed that atoms did not exist! Imagine what he would have thought when J.J. Thomson discovered the electron!!!) He did not know that the atoms of each element contained a unique number of protons. In 1913, a British physicist named Henry Moseley determined an atomic number for each known element. Tellurium's atomic number is 52 and iodine's is 53, so it makes sense for iodine to come after tellurium in the periodic table. In the modern periodic table, elements are arranged in order of increasing atomic number. The rows of the periodic table are called periods. Each period corresponds to a principal energy level (electron energy levels, i.e. 1, 2,.). There are more elements in higher-numbered periods because there are more electron orbitals (s, p, d, f) in higher energy levels. The properties of the elements within a period change as you move across a period from left to right. However, the pattern of properties within a period repeats as you move from one period to the next. This pattern gives rise to the periodic law. What does the periodic law state and mean? The columns of the periodic table are called groups. Elements that have similar chemical and physical properties end up in the same group or column in the periodic table.
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