Tag: the periodic table

Quizzes (8) Questions (146)

Questions Related to the periodic table

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

What type of oxide would Eka-aluminium form?

  1. $EO _3$
  2. $E _3O _2$
  3. $E _2O _3$
  4. $EO$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Eka- Aluminium (E) forms oxide with the same empirical formula is Aluminium oxide. Thus, it forms ${ E } _{ 2 }{ O } _{ 3 }$ oxide.


Hence, option C is correct.

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

Number of short periods in Mendeleev table is :

  1. $2$
  2. $3$
  3. $4$
  4. $1$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Period number 1, 2 and 3 contain 2, 8 and 8 elements respectively. Other periods contain more than 8 elements. Hence, the first three periods are called as short periods. So, total of 3 short periods are there in Mendeleev periodic table.

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 properties of the elements, as well as the formulae and properties of their compounds, depend in a periodic manner on the atomic weights of the elements. This periodic law was given by:

  1. J. Lothar Meyer

  2. John A.R. Newlands

  3. Dobernier

  4. D. I. Mendeleev
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Dmitri Mendeleev formulated the periodic law stating that the properties of elements are a periodic function of their atomic weights.

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 anomalous pairs in Mendeleev's periodic table is/are_______.

  1. Co, Ni

  2. Te, I

  3. Ar, K

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

Anomalous pairs in mendeleev's periodic table are
`
Cu,Ni,Te,I,Ar,K

Anomalous pairs are of consecutive elements. Thus if we observe Mendeleev's periodic table, all the given options form anomalous pairs.

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

In the modified Mendeleev's  periodic table,____ group and_periods are present, whereas in the modern periodic table,groups and___periods are present, respectively:

  1. 9, 8, 18, 7

  2. 7, 9, 18, 7

  3. 9, 7, 18, 8

  4. 8, 7, 18, 7
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In the modified Mendeleev's periodic table, 8 groups and 7 periods are present, whereas in modern periodic table, 18 groups and 7 periods are present, respectively.

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

According to Mendeleev's periodic table, one element whose atomic mass is greater than that of nickel is placed before Nickel. Name the element:

  1. Copper

  2. Iron

  3. Zinc

  4. Cobalt
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cobalt was placed before nickel despite having atomic mass greater than that of nickel to maintain the periodicity in chemical properties.

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 of the following is a defect in the Mendleev's periodic table?

  1. Prediction of new elements

  2. Doubtful atomic weights

  3. Anomalous position of hydrogen

  4. Non-systematic study of elements
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Position of hydrogen was not right in the Mendleevs' periodic table. It was placed in IA. However, it resembles the elements of both IA(alkali metals) and group VII A (halogens).

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

State true or false.
1. Position of isotopes was clearly defined in Mendleev's periodic table.
2. Position of lanthanides and actinides was clearly defined in Mendleev's periodic table.

  1. True,True

  2. True, False

  3. False, True

  4. False, False
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Since, Mendeleev's classification is based on atomic weights, position of isotopes was not given. Lanthanides and Actinides were not known at that time. Their position has not been defined in the periodic table.

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

Among the following, which are not given a proper place in periodic table?

  1. Alkali earth metals

  2. Lanthanides

  3. Actinides

  4. Both B and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fourteen elements that follow lanthanum called lanthanides and fourteen elements following actinium called actinides were not given proper places in Modern  periodic table.

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 of the following are the demerits of Mendeleev periodic table?

  1. No proper position for hydrogen is given.

  2. Grouping of chemically dissimilar elements.

  3. Position given to isotopes.

  4. Presence of anomalous pairs.
Reveal answer Fill a bubble to check yourself
A,B,C,D Correct answer
Explanation
1. Mendeleev could not assign a correct position to hydrogen in the periodic table as hydrogen resembles alkali metals as well as halogens.
2.     Isotopes had to be given the same position in the periodic table though isotopes of the same elements have different atomic masses. 
3.  It was observed that at certain places, an element of higher atomic mass Cobalt (Co=58.93) has been placed before an element of lower atomic mass Nickel (Ni = 58.71).
4. Some elements placed in the same sub - group varies in their properties. Manganese is placed with halogens which totally differ in the properties.