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Questions and Answers
What is the total number of elements in Mendeleev's periodic table?
What is the total number of elements in Mendeleev's periodic table?
Which scientist is known for leaving empty cells in his periodic table for future discoveries?
Which scientist is known for leaving empty cells in his periodic table for future discoveries?
Into how many subgroups did Mendeleev classify the elements of each main group?
Into how many subgroups did Mendeleev classify the elements of each main group?
Which subatomic particle is found in the nucleus and carries a positive charge?
Which subatomic particle is found in the nucleus and carries a positive charge?
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Who discovered that the nucleus of the atom contains positively charged protons?
Who discovered that the nucleus of the atom contains positively charged protons?
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Which arrangement method distinguishes Mendeleev's and Moseley's periodic table?
Which arrangement method distinguishes Mendeleev's and Moseley's periodic table?
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How many vertical groups are present in the modern periodic table?
How many vertical groups are present in the modern periodic table?
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What characterizes the arrangement of elements in the modern periodic table?
What characterizes the arrangement of elements in the modern periodic table?
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In which group and period can you find Element Na?
In which group and period can you find Element Na?
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What is the name of the block characterized by letter Z in the periodic table?
What is the name of the block characterized by letter Z in the periodic table?
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How many groups does the D block contain?
How many groups does the D block contain?
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What is the atomic number of Element Y located in the second period and 3A group?
What is the atomic number of Element Y located in the second period and 3A group?
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What is the new group number for Element Z in the 7A group?
What is the new group number for Element Z in the 7A group?
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What is the mass number of the monovalent metallic element located in the third period with 12 neutrons?
What is the mass number of the monovalent metallic element located in the third period with 12 neutrons?
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Who is credited with adding the zero group to Mendeleev's periodic table?
Who is credited with adding the zero group to Mendeleev's periodic table?
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How many known elements are there in the modern periodic table?
How many known elements are there in the modern periodic table?
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Which of the following correctly states the reason why lithium (Li3) and nitrogen (N7) are located in the same period?
Which of the following correctly states the reason why lithium (Li3) and nitrogen (N7) are located in the same period?
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What is the number of groups in the d-block of the periodic table?
What is the number of groups in the d-block of the periodic table?
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Mendeleev had to make disturbances in the order of atomic weights for which reason?
Mendeleev had to make disturbances in the order of atomic weights for which reason?
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Which term refers to the number of energy sublevels in each main energy level?
Which term refers to the number of energy sublevels in each main energy level?
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Study Notes
The Periodic Table
- Dmitri Mendeleev arranged elements in order of increasing atomic weight
- Henry Moseley arranged elements in order of increasing atomic number
- The modern periodic table has 18 vertical groups and 7 horizontal periods
Modern Periodic Table
- Based on atomic number
- Elements with similar chemical properties are grouped together
- Electrons fill up energy sublevels in a specific order
Locating Elements
- Hydrogen (H) is in period 1 group 1A
- Neon (Ne) is in period 2 group 0/18
- Calcium (Ca) is in period 4 group 2A
- Sodium (Na) is in period 3 group 1A
- Aluminum (Al) is in period 3 group 3A/13
- Argon (Ar) is in period 3 group 0/18
Atomic Numbers
- Group 0/18, period 1 has an atomic number of 2
- Group 3A, period 2 has an atomic number of 5
- Group 7A, period 3 has an atomic number of 17
Blocks
- S-block: Includes group 1A and 2A, 2 groups total
- D-block: Includes groups 3B to 12B, 10 groups total
- P-block: Includes groups 3A to 8A, 6 groups total
- Group 7A also known as 17
- Group 0 also known as 18
Electronic Configuration
- An element's atomic number is given by the sum of protons in its nucleus
- The element following a given element in the same period will have an atomic number one higher
- The element following in the same group will be 8 atomic numbers higher
Key Figures
- Mendeleev created the first periodic table
- Rutherford discovered the nucleus of the atom contains protons
- Bohr discovered the principal energy levels of the atom
- Moseley corrected atomic weights of some elements and added the zero group to the periodic table
Key Terms
- Periodic table: organizes elements by atomic number and recurring properties
- Protons: positively charged particles in the nucleus of an atom
- Atomic weight: the average mass of an atom
- Atomic number: the number of protons in the nucleus of an atom
- Main energy levels: electron shells surrounding the nucleus
- Energy sublevels: the different energy levels within an electron shell
### Periodic Table Facts
- Mendeleev's periodic table included 67 elements
- The modern periodic table has 118 elements
- 92 elements are found naturally on Earth
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Description
Explore the structure and organization of the modern periodic table. This quiz covers key aspects such as atomic number, groups, periods, and the historical context of its development. Test your knowledge of element locations and their properties.
