Tag: mendeleef's periodic table

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Multiple choice chemistry the periodic table mendeleef's periodic table mendeleev's periodic law and its limitations mendeleev's periodic table development of the modern periodic table into the history

Eka-silicon was the name given by Mendeleev to the element similar to ________ in properties.

  1. Boron

  2. Germanium

  3. Aluminium

  4. Silicon
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The name given to the element, by Mendeleev, similar to Germanium in properties was Eka-Silicon.

Multiple choice chemistry the periodic table mendeleef's periodic table mendeleev's periodic law and its limitations mendeleev's periodic table development of the modern periodic table into the history

Which element was not known when Mendeleev gave his classification?

  1. Germanium

  2. Gallium

  3. Scandium

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The elements which were unknown when Mendeleev gave his classification were geranium, gallium and scandium. He left gaps for the unknown elements and predicted correctly the properties of some of the unknown elements.

Multiple choice chemistry the periodic table mendeleef's periodic table mendeleev's periodic law and its limitations mendeleev's periodic table development of the modern periodic table into the history

Mendeleev used a Sanskrit numeral before the names of the predicted elements. What was the term used for it?

  1. Sasi

  2. Eka

  3. Astan

  4. Pancan
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A Sanskrit numeral used before the names of the predicted elements was Eka which means one.

Multiple choice chemistry the periodic table mendeleef's periodic table mendeleev's periodic law and its limitations mendeleev's periodic table development of the modern periodic table into the history

The elements having more masses were placed before elements having lower masses in Mendleev's periodic table. Guess the pair of elements (higher mass, lower mass).

  1. Cobalt, Nickel

  2. Vanadium, Chromium

  3. Tellurium, Iodine

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The elements having more masses were placed before elements having lower masses were cobalt, vanadium, tellurium. Its corresponding elements were nickel, chromium and iodine.