Mendeleev's Periodic Table

Q. State modern periodic law

Q. Give limitations of Modern periodic table.

Q.

The three elements predicted by Mendeleev from the gaps in his periodic table were known as eka-boron, eka-aluminium and eka-silicon. What names were given to these elements when they were discovered later on?

Q.

What were the limitations of mendeleev's periodic Table and what were the major achievements of the same?

Q.

In Mendeleevs periodic table, the groups were divided into how many subgroups?

Q.

The modern periodic table was prepared by :

(a) Dobereiner (b) Newlands (c) Bohr (d) Mendeleev

Q.

In modern terminology, Eka – Silicon is called as:

1. Germanium

2. Phosphorous

3. Carbon

4. Aluminium

Q. In the Mendeleev's periodic table the elements with similar chemical properties are in the same ______.

1. triad
2. group
3. period
4. octave

Q. How did Mendeleev exactly predict the mass of eka aluminium?

Q.

The modern periodic table was prepared by :

(a) Dobereiner (b) Newlands (c) Bohr (d) Mendeleev

Q.

Initially it was believed that atomic mass of beryllium was 13. but mendeleev suggested that its atomic mass should be 9.

1. was mendeleev suggestion correct?

2.how had he reached to this conclusion?

Q. Which element replaced eka-silicon in the modern periodic table?

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

Q.

Two elements X and Y need to be arranged in Mendeleev's periodic table. X has 3 protons more ​​​​​than Y but their neutrons are equal in number. Which of the following is correct about X and Y?

1. X will be placed after Y

2. X and Y should be placed together.

3. X and Y are isotopes.

4. Y will be placed after X.

Q. What were the names used to denote the existance of undiscovered elements such as 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. Which element in the modern periodic table is similar to eka-silicon?

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

Q. The relationship between atomic weights and the properties of elements was first proposed by

1. Dobereiner
2. Dmitri Mendeleev
3. Moseley
4. Newland

Q. is often referred to as the father of the periodic table.

1. Johann Doberenier
2. Dmitri Mendleev
3. Aristotle
4. Empedocles

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. Which of the following is not correct for Mendeleev periodic table?

1. Element properties were a periodic function of their atomic numbers
2. It could predict the existence of other elements and left spaces for them
3. The position of isotopes were not fixed
4. Hydrogen element was not properly placed

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.

Name elements whose properties were predicted on the basis of their position in the Mendeleev periodic table.

Q.

________having higher atomic weight was placed before Nickel.

Q.

Choose the incorrect statement in view of Mendeleev's Periodic Table

1. Position of hydrogen was clear.

2. Atomic masses were not strictly followed.

3. Isotopes of elements were placed at same position.

4. Elements were arranged in order of their atomic masses

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. Noble gases are considered to be inert. Identify a pair of noble gases from the options.

1. Helium and Hydrogen
2. Neon and Argon
3. Helium and Neon
4. Nitrogen and Neon

Q. Noble gases are considered to be inert. What do you understand by the term, ‘inert’?

1. Chemically inactive
2. Does not react
3. Chemically stable
4. All of the above

Q. Assertion :According to Mendeleev, the properties of elements are a periodic function of their atomic weights. Reason: Mendeleev left the gap under aluminium and a gap under silicon, and called these elements Eka-Aluminium and Eka-Silicon.

1. Assertion and reason both are correct statements and reason is the correct explanation for assertion.
2. Assertion and reason both are correct statements but the reason is not the correct explanation for assertion
3. Assertion is correct statement but reason is wrong statement.
4. Assertion and reason both are wrong statements.

Q. was adopted as the basis of modern periodic table.

1. Atomic structure
2. Atomic model
3. Atomic number
4. Atomic mass

Q. Mendeleev predicted the existence of certain elements not known at that time and named as Eka-aluminiumT he elements which have taken the place of Eka-aluminium is :

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

Q. Which of the following statement is incorrect regarding the Mendeleev's periodic table?

1. It has made the study of elements easier and systematic.
2. It has helped in correcting the doubtful atomic weights.
3. It has paved the way for the discovery of new elements.
4. Isotopes of the elements were placed at the same position in the periodic table.