Tag: development of the modern periodic table

Questions Related to development of the modern periodic table

According to Mendeleev's periodic law, the properties of elements are a periodic function of:

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

  1. atomic number.

  2. atomic weight.

  3. number of electrons.

  4. density.

Show answer
Correct Option: B
Explanation:

In 1869, Dmitri Mendeleev and Lothar Meyer individually came up with their own periodic law "when the elements are arranged in order of increasing atomic mass, certain sets of properties recur periodically." 


Hence, the correct option is $\text{B}$

Two elements were elected by Mendeleev for studying the properties of compounds formed by other elements with the selected elements. What were the selected elements?

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

  1. Oxygen, Nitrogen

  2. Hydrogen, Carbon

  3. Hydrogen, Oxygen

  4. Oxygen, Carbon

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Correct Option: C
Explanation:

The elements selected by Mendeleev were oxygen and hydrogen because most of the elements reacted with oxygen and hydrogen.

The eight group of Mendeleev's periodic table is divided into how many subgroups?

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

  1. $2$

  2. $0$

  3. $4$

  4. $1$

Show answer
Correct Option: B
Explanation:

The eight group in Mendeleev's periodic table was not divided into any group. It contained transition series elements.

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

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

  1. Boron

  2. Germanium

  3. Aluminium

  4. Silicon

Show answer
Correct Option: B
Explanation:

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

Eka-Boron was the name given by Mendeleev to the element similar to _______ in properties.

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

  1. Scandium

  2. Silicon

  3. Aluminium

  4. Boron

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Correct Option: A
Explanation:

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

The groups from $1^{st}$ to $7^{th}$ of Mendeleev's periodic table were divided into ______ subgroups.

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

  1. $2$

  2. $3$

  3. $4$

  4. $1$

Show answer
Correct Option: A
Explanation:

The groups from $1$st to $7$th of Mendeleev's periodic table were divided into two subgroups A and B.

Eka-aluminium forms oxide of the type :

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

  1. $E _2O$

  2. $EO$

  3. $E _2O _3$

  4. $E _3O _4$

Show answer
Correct Option: C
Explanation:

The properties of Eka-aluminium are similar to gallium so it forms oxide of the type $E _2O _3$ same as $Ga _2O _3$.

Eka-aluminium forms chloride of the type :

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

  1. $E _2Cl$

  2. $ECl _3$

  3. $E _2Cl _3$

  4. $E _3Cl _4$

Show answer
Correct Option: B
Explanation:

The properties of Eka-aluminium are similar to gallium so it forms chloride of the type $ECl _3$ same as $GaCl _3$.

Which element was not known when Mendeleev gave his classification?

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

  1. Germanium

  2. Gallium

  3. Scandium

  4. All of the above

Show answer
Correct Option: D
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.

Which periods were not divided into two series in the Mendeleev's periodic table?

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

  1. $4$

  2. $5$

  3. $6$

  4. None of the above

Show answer
Correct Option: D
Explanation:

$4^{th}$, $5^{th}$ and $6^{th}$ period were divided into two series: first series and second series.