The Periodic Table and Dmitri Mendeleev

Dmitri Mendeleev

Atomic mass

To leave gaps for yet to be discovered elements

<p>Increasing atomic number</p> Signup and view all the answers

<p>Silicon and boron</p> Signup and view all the answers

<p>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.</p> Signup and view all the answers

<p>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).</p> Signup and view all the answers

<p>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.</p> Signup and view all the answers

<p>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.</p> Signup and view all the answers

<p>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.</p> Signup and view all the answers

<p>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.</p> Signup and view all the answers

<p>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.</p> Signup and view all the answers

<p>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.</p> Signup and view all the answers

<p>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.</p> Signup and view all the answers

<p>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.</p> Signup and view all the answers