Mendeleev calculated atomic number by increasing atomic number, which match the number of protons in an atomic nucleus of a single element
Mendeleev arranged elements in order of increasing mass. Later modern periodic table was discovered that contains elements arranged by atomic number.
Mendeleev's periodic law, formulated in the 19th century, states that the properties of elements are a periodic function of their atomic mass, leading to the arrangement of elements in his periodic table based on increasing atomic mass. In contrast, Moseley's periodic law, established in the early 20th century, revised this idea by asserting that the properties of elements are better correlated with their atomic number rather than atomic mass. This shift corrected inconsistencies in Mendeleev's table and laid the foundation for the modern periodic table, where elements are arranged by increasing atomic number.
Atomic mass. The modern table is based on atomic number.
His table was sorted by atomic mass, not atomic number. (the way today's periodic table is sorted) Mendeleev was almost right, but they did not know about protons at the time. (atomic number is the number of protons in an element) There would have been absolutely no way of him figuring out they were related to atomic number if he didn't even know about atomic number
Number of protons are taken. They are arranged by number of protons. Mendeleev arranged elements first according to atomic number
The atomic number is equal to the number of protons in an atomic nucleus; the atomic number is the order number of a chemical element in the periodic table of Mendeleev.
Mendeleev arranged elements in order of increasing mass. Later modern periodic table was discovered that contains elements arranged by atomic number.
Mendeleev's periodic law, formulated in the 19th century, states that the properties of elements are a periodic function of their atomic mass, leading to the arrangement of elements in his periodic table based on increasing atomic mass. In contrast, Moseley's periodic law, established in the early 20th century, revised this idea by asserting that the properties of elements are better correlated with their atomic number rather than atomic mass. This shift corrected inconsistencies in Mendeleev's table and laid the foundation for the modern periodic table, where elements are arranged by increasing atomic number.
Mendeleev
Atomic number = Number of protons = Number of electrons (in the neutral state) Also the atomic number is number of a chemical element in the periodic table of Mendeleev.
Atomic mass. The modern table is based on atomic number.
Atomic number was not used by Mendeleev to organize his periodic table. He organized the elements based on their atomic mass and properties, leaving gaps for undiscovered elements that were later filled.
Number of protons are taken. They are arranged by number of protons. Mendeleev arranged elements first according to atomic number
Atomic number = number of protons = number of electrons (in the neutral state) Also the atomic number is the number of the position of a chemical element in the periodic table of Mendeleev.
Dmitri Mendeleev
The atomic number is the number of a chemical element in the periodic table of Mendeleev; the atomic number is equal to the number of protons and electrons. The atomic mass is the mass of an atom expressed in relative atomic mass units.
The numbers on Mendeleev's periodic table represent the atomic number of each element, which is the number of protons in the nucleus of an atom. This number determines the element's identity and its placement in the periodic table.