Eka-aluminium was the name given by Dmitri Mendeleev to an element that he predicted would have properties similar to aluminium but with a higher atomic mass. This element was later discovered and named gallium. He placed it in his periodic table as an element with an atomic mass of around 68.
The actual atomic mass of gallium, which replaced eka-aluminum, is 69.72 atomic mass units (amu).
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60 Mins English English80 Questions160 Marks60 Mins English English20 Questions40 Marks25 Mins EnglishH₂O + C → H₂ + CO
The above reaction is an example of
When an iron nail is placed in copper sulphate solution, what is observed?
Which of the following is NOT a Döbereiner’s triad?
In which of two groups of elements have highly negative electron gain enthalpies and readily add one or two electrons respectively to attain the stable noble gas configuration?
Which of the following elements is classified as a lanthanoid group element?
Suggested Test Series
Suggested Test Series
H₂O + C → H₂ + CO
The above reaction is an example of
When an iron nail is placed in copper sulphate solution, what is observed?
Which of the following is NOT a Döbereiner’s triad?
In which of two groups of elements have highly negative electron gain enthalpies and readily add one or two electrons respectively to attain the stable noble gas configuration?
Which of the following elements is classified as a lanthanoid group element?
