# The Periodic Table and Dmitri Mendeleev

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## 15 Questions

Dmitri Mendeleev

Atomic mass

### What was Mendeleev's big idea when arranging the periodic table?

To leave gaps for yet to be discovered elements

### What is the basis of the modern periodic table's arrangement of elements?

Increasing atomic number

### What were some elements that Mendeleev was able to predict the properties of?

Silicon and boron

### Explain the significance of Dmitri Mendeleev's arrangement of the periodic table and how it was based on atomic mass?

Dmitri Mendeleev's arrangement of the periodic table was significant because he left gaps for yet to be discovered elements and was able to predict the properties of some of these elements. His arrangement was based on atomic mass, and he arranged the elements in order of increasing atomic mass.

### Describe the basis of the modern periodic table's arrangement of elements and how elements with similar properties are grouped.

In the modern periodic table, elements are arranged in rows (periods) in order of increasing atomic number. Elements with similar properties are placed in vertical columns (groups).

### Explain how Dmitri Mendeleev's ability to predict the properties of some elements contributed to the acceptance of his periodic table arrangement?

Dmitri Mendeleev's ability to predict the properties of elements such as silicon and boron, and the accuracy of these predictions, contributed to the acceptance of his periodic table arrangement.

### Discuss the development of the periodic table and the role of Dmitri Mendeleev in its advancement.

Dmitri Mendeleev, a professor at St. Petersburg University, developed the periodic table in 1869 based on atomic mass. His arrangement included leaving gaps for yet to be discovered elements and predicting the properties of some of these elements.

### Explain the significance of leaving gaps for yet to be discovered elements in Mendeleev's periodic table arrangement.

Leaving gaps for yet to be discovered elements in Mendeleev's periodic table arrangement allowed for the prediction of the properties of these elements, demonstrating the foresight and accuracy of his arrangement.

### Who is credited as the father of the periodic table and what was his big idea when arranging the elements in the table?

Dmitri Mendeleev is credited as the father of the periodic table. His big idea was to leave gaps for yet to be discovered elements and predict the properties of some of these elements, based on their position and atomic mass in the table.

### Explain how elements are arranged in the modern periodic table and what determines their placement in specific rows and columns?

In the modern periodic table, elements are arranged in periods (rows) in order of increasing atomic number. Elements with similar properties are placed in groups (columns). The atomic number determines the placement of elements in specific rows and columns.

### What was the basis of Dmitri Mendeleev's arrangement of the periodic table and how did he demonstrate the significance of leaving gaps for yet to be discovered elements?

Mendeleev's arrangement was based on atomic mass. He demonstrated the significance of leaving gaps by accurately predicting the properties of some yet to be discovered elements, such as silicon and boron.

### Discuss the significance of Dmitri Mendeleev's arrangement of the periodic table and its acceptance, as well as its influence on the modern periodic table.

Mendeleev's arrangement, based on atomic mass and leaving gaps for undiscovered elements, was significant because of his accurate predictions and the acceptance of his table. It laid the foundation for the modern periodic table arrangement we use today.

### Explain the role of Dmitri Mendeleev in the development of the periodic table and how his arrangement differed from previous attempts.

Dmitri Mendeleev played a crucial role in the development of the periodic table by arranging elements based on atomic mass and leaving gaps for undiscovered elements. His approach differed from previous attempts by accurately predicting the properties of unknown elements, leading to the acceptance of his arrangement.

Test your knowledge about the periodic table and its development, along with the role of Dmitri Mendeleev as its creator. Explore the relationship between atomic numbers and the arrangement of elements in the periodic table.

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