How did Mendeleev come up with the first periodic table of the elements?(1 point)
Responses
He estimated the number of electrons in atoms of each element.
He estimated the number of electrons in atoms of each element.
He organized the elements by their atomic number.
He organized the elements by their atomic number.
He arranged the elements by different properties to find a pattern.
He arranged the elements by different properties to find a pattern.
He determined the mass of atoms of each element.
He arranged the elements by different properties to find a pattern.
He determined the mass of atoms of each element.
The correct answer is: He arranged the elements by different properties to find a pattern.
Explanation:
Dmitri Mendeleev created the first periodic table of elements by arranging the elements in order of increasing atomic mass and observing patterns in their properties. He noticed that when elements were grouped this way, certain similarities and trends emerged, such as the repeating pattern of chemical reactivity. Mendeleev also left gaps in his periodic table for elements that had not yet been discovered, predicting their properties based on the pattern he observed. Eventually, when new elements were discovered and found to fit into these predicted positions, it confirmed the accuracy of his periodic table. So, Mendeleev came up with the first periodic table by arranging the elements based on their properties and looking for patterns in their behavior.