Mendeleev predicted the existence of which element/elements in the periodic table?a)Galliumb)Sodium and germaniumc)Gallium and germaniumd)Germanium and GoldCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

(i) Gallium is the element which has taken the place of eka-aluminium.      (ii) Germanium is the element which has taken the place of eka-silicon. (b) Gallium and Germanium are placed in the 4th period of the periodic table. (c) Gallium belongs to group 13 and Germanium belongs to group 14 in the periodic table. (d) Gallium is a metal and Germanium, a metalloid.

Answer

Yes the correct answer is c gallium And germanium were the elements not discovered at they time and Mendeleev put gaps in it periodic table gallium was called as eka aluminium and germanium was called as eka silicon... hope u understand.

Answer

Mendeleev proved that the new elements are going to exist in future and named them eka boron ,eka aluminium,eka silicon

Answer

Mendeleev, a Russian chemist, is famously known for his contribution to the development of the periodic table. In 1869, he published his periodic table, which arranged the known elements in order of increasing atomic mass and grouped them based on their similar properties. Mendeleev's periodic table also left gaps for elements that were yet to be discovered. These gaps were significant because Mendeleev was able to predict the existence and properties of these missing elements based on the patterns and trends he observed in the known elements.

Mendeleev's predictions were based on the periodicity of the elements, which means that elements with similar properties tend to occur at regular intervals. He noticed that there were certain patterns in the elements' properties that repeated periodically as he arranged them in order of increasing atomic mass.

- The prediction of Gallium:
One of Mendeleev's notable predictions was the existence of gallium (Ga). At the time, there were no known elements with atomic masses between aluminum (Al) and indium (In). However, Mendeleev placed gallium in this gap and predicted its properties. He correctly predicted that gallium would have properties similar to aluminum and indium, such as a low melting point and a tendency to form a +3 ion. His prediction was confirmed in 1875 when gallium was discovered.

- The prediction of Germanium:
Another significant prediction made by Mendeleev was the element germanium (Ge). In Mendeleev's periodic table, there was a gap between silicon (Si) and tin (Sn). Mendeleev predicted that an element with properties similar to silicon would fill this gap. He even named this element ekasilicon. Germanium was discovered in 1886 by Clemens Winkler, who realized that it matched Mendeleev's predictions. Germanium indeed shares similar properties with silicon, such as being a semiconductor.

- The prediction of Sodium:
While Mendeleev did not predict the existence of sodium (Na) specifically, he did predict the existence of elements with similar properties to sodium. In his periodic table, there was a gap between lithium (Li) and potassium (K). Mendeleev predicted that an element with properties similar to lithium would fill this gap. Sodium, with its similar properties to lithium, was discovered earlier in history, but Mendeleev's periodic table helped to explain and organize its properties.

In conclusion, Mendeleev's predictions of gallium and germanium were particularly significant because he accurately predicted their existence and properties based on the patterns and trends he observed in the periodic table. While he did not specifically predict sodium, he did predict the existence of elements with similar properties. Mendeleev's periodic table revolutionized the field of chemistry and laid the foundation for our modern understanding of the elements.

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