Mendeleev’s Periodic Table

Q.

What is the meaning of Eka?

Q. The actual name of eka-aluminium is

1. scandium
2. gallium
3. germanium
4. silicon

Q. How many elements were discovered till the time when Mendeleev made the periodic table?

1. 126
2. 63
3. 113
4. 90

Q. In Mendeleev’s Periodic Table the elements were arranged in the increasing order of their atomic masses. However, cobalt with atomic mass of 58.93 amu was placed before nickel having an atomic mass of 58.71 amu. Give reason for the same.

Q.

State Mendeleevs periodic law

Q.

With respect to the merits of the Mendeleev periodic table answer the following question

How was the study of elements made simpler and systematic?

Q.

Which chemical compounds of elements were used by Mendeleev to gauge their chemical similarities?

(A) Oxides (B) Chlorides (C) Hydrides (D) Sulphites

1. A, C

2. A, B, C

3. B, D

4. A, B, C, D

Q.

Statement 1(S1): There was no place for isotopes of elements in Mendeléev’s periodic table.
Statement 2(S2): Mendeléev’s periodic table was based on increasing atomic mass of the elements.

1. Both statements are false.
2. S2 is true but S1 is false.
3. S1 is true but S2 is false.
4. Both statements are true.

Q. In Mendeleev’s periodic table, the vertical columns are called and horizontal rows are referred to as .

1. groups
2. periods
3. classes
4. blocks

Q. Which of the following elements belong to the first group of Mendeleev's periodic table?

1. Hydrogen
2. Lithium
3. Beryllium
4. Sodium
5. Boron
6. Potassium
7. Caesium
8. Nitrogen

Q. The predicted name for germanium is

1. eka-boron
2. eka-silicon
3. eka-aluminium
4. eka-scandium

Q. Mendeleev placed hydrogen in the 1st group along with alkali metals.

1. False
2. True

Q.

Which chemical compounds of elements were used by Mendeleev to gauge their chemical similarities?

(A) Oxides (B) Chlorides (C) Hydrides (D) Sulphites

1. A, C

2. B, D

3. A, B, C

4. A, B, C, D

Q. According to Mendeleev’s periodic law, the properties of the elements are the periodic function of their.

1. atomic masses
2. atomic numbers
3. atomic volumes

Q.

With respect to the merits of Mendeleevs periodic table answer the following questions.

Where was germanium placed?

Q. Which chemical compounds of elements were used by Mendeleev to gauge their chemical similarities?

1. Oxides
2. Chlorides
3. Hydrides
4. Sulphates

Q. According to Mendeleev’s periodic law, the properties of the elements are the periodic function of their .

1. atomic masses
2. atomic numbers
3. atomic densities
4. atomic volumes