no they are not.they are arranged in periods
Moseley arranged elements according to atomic number.Mendeleev arranged elements according to atomic mass.
Mendeleev attempted to organize the chemical elements based on their atomic mass and properties, creating the periodic table. He arranged the elements in rows and columns with similar properties to create patterns and predict the properties of unknown elements.
Elements arranged in one column exhibit similar chemical properties. Elements in same column also have similar physical properties. Also elements in same column has similar electronic configuration.
Early attempts at organizing the elements were arranged according to their atomic mass. This led to the development of the periodic table by Dmitri Mendeleev in 1869, where elements were grouped based on their chemical and physical properties.
Mendeleev believed that the properties of elements depended on their atomic mass and their periodicity. He noticed that when elements were arranged in order of increasing atomic mass, their chemical and physical properties exhibited a recurring pattern. This led him to formulate the periodic law, which states that the properties of elements are a periodic function of their atomic weights. This arrangement allowed him to predict the existence and properties of undiscovered elements.
Moseley arranged elements according to atomic number.Mendeleev arranged elements according to atomic mass.
Mendeleev arranged the known elements in a table based on their atomic mass and chemical properties. He grouped elements with similar properties together in columns, known as groups, and arranged them in rows based on increasing atomic mass. He left gaps for undiscovered elements predicting their properties.
Dmitri Mendeleev
Mendeleev attempted to organize the chemical elements based on their atomic mass and properties, creating the periodic table. He arranged the elements in rows and columns with similar properties to create patterns and predict the properties of unknown elements.
This statement is a simplified explanation of the periodic law, which states that the properties of elements are periodic functions of their atomic numbers. This periodicity is observed in the arrangement of elements in the periodic table, where elements with similar properties appear in the same column (group) due to their similar electron configurations.
Mendeleev's table was also based upon his Periodic Law, which stated that when elements are arranged by increasing atomic number, there is a periodic repetition of similar chemical and physical properties.
Elements arranged in one column exhibit similar chemical properties. Elements in same column also have similar physical properties. Also elements in same column has similar electronic configuration.
These elements have similar chemical and physical properties.
The elements are arranged in the periodic table based on their atomic number, which is the number of protons in the nucleus of an atom. This arrangement helps to show repeating patterns in the properties of elements, such as their chemical reactivity and physical characteristics. The periodic table is structured so that elements with similar properties are grouped together in columns called groups or families.
Early attempts at organizing the elements were arranged according to their atomic mass. This led to the development of the periodic table by Dmitri Mendeleev in 1869, where elements were grouped based on their chemical and physical properties.
Mendeleev's table was also based upon his Periodic Law, which stated that when elements are arranged by increasing atomic number, there is a periodic repetition of similar chemical and physical properties.
Mendeleev chose to order the known elements by mass because he observed that there was a pattern in the physical and chemical properties of elements when they were arranged by increasing atomic mass. This led him to develop the periodic table, where elements with similar properties were grouped together.