What properties did mendeleev use to classify elements in his periodic table?
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by their atomic masses.because at that time they thought that atomic Mass are the fundamental property of an atom
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HÈLLØ!!
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▶️A Russian chemist, Dmitri Mendeleev was the first to develop a periodic table & he gave a law called Mendeleev periodic law which states that the physical & chemical properties of the elements are a periodic function of their atomic masses.
▶️On the basis of this law he developed a Mendeleev periodic table, where he arranged the elements in his periodic table ordered by atomic weight or mass.
▶️He arranged the elements in periods and groups in order of their increasing atomic weight.
▶️He placed the elements with similar properties in the same group.
▶️However, he did not stick to this arrangement for long.
▶️He found out that if the elements were arranged strictly in order of their increasing atomic weights, then some elements did not fit within this scheme of classification.
▶️Therefore, he ignored the order of atomic weights in some cases.
▶️For example, the atomic weight of iodine is lower than that of tellurium.
▶️Still Mendeleev placed tellurium (in Group VI) before iodine (in Group VII) simply because iodine’s properties are so similar to fluorine, chlorine, and bromine.
_________________________________
THÅÑKẞ!!
_________________________________
▶️A Russian chemist, Dmitri Mendeleev was the first to develop a periodic table & he gave a law called Mendeleev periodic law which states that the physical & chemical properties of the elements are a periodic function of their atomic masses.
▶️On the basis of this law he developed a Mendeleev periodic table, where he arranged the elements in his periodic table ordered by atomic weight or mass.
▶️He arranged the elements in periods and groups in order of their increasing atomic weight.
▶️He placed the elements with similar properties in the same group.
▶️However, he did not stick to this arrangement for long.
▶️He found out that if the elements were arranged strictly in order of their increasing atomic weights, then some elements did not fit within this scheme of classification.
▶️Therefore, he ignored the order of atomic weights in some cases.
▶️For example, the atomic weight of iodine is lower than that of tellurium.
▶️Still Mendeleev placed tellurium (in Group VI) before iodine (in Group VII) simply because iodine’s properties are so similar to fluorine, chlorine, and bromine.
_________________________________
THÅÑKẞ!!
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