Achievements of Mendeleev’s Periodic Table

Q.

What was the name given to Eka-silicon after it was discovered?

Q. Mendeleev created the 'zero group' only to fit the noble gases which were discovered towards the end of 19th century.

1. True
2. False

Q.

Which group of elements could be placed in Mendeleev’s ′ Periodic Table without disturbing the original order? Give reason.

Q. In Mendeleev's periodic table, the elements with similar chemical properties were placed in the same .

1. octave
2. group
3. period

Q. The element "Eka-aluminium" predicted by Mendeleev was later discovered as

1. Gallium
2. Helium
3. Scandium
4. Calcium

Q. Mendeleev predicted the existence of some elements that had not been discovered at that time and left some gaps in his periodic table. What are the names that he gave to the two undiscovered elements, gallium and germanium, respectively?

1. Eka-aluminium and Eka-silicon
2. Eka-boron and Eka-aluminium
3. Eka-silicon and Eka-aluminium
4. Eka-aluminium and Eka-boron

Q. In Mendeleev's periodic table, the elements with similar chemical properties were placed in the same .

1. octave
2. group
3. period

Q. Which of the following are the merits of the Mendeleev's periodic table?

1. Vacant slots were kept for elements not discovered back then.
2. Elements with similar properties were kept in the same group.
3. The position of hydrogen was finally fixed.
4. Corrections in the atomic masses of certain elements were made.

Q. Which of the following element(s) in the modern periodic table resemble elements predicted by Mendeleev?

(More than one option is correct)

1. Gallium
2. Scandium
3. Silicon
4. Germanium

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

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

Q. Match the following elements from Mendeleev's periodic table to their names in the modern periodic table.

1. Gallium
2. Scandium
3. Germanium

Q.

Mendeleevs periodic table also suffered from a lot of defects. Answer the following questions in keeping in mind the defects of Mendeleevs periodic table.

Which two chemically similar elements were separated?

Q. Which element in the modern periodic table is similar to eka-silicon?

1. Phosphorus
2. Carbon
3. Germanium
4. Aluminium