Mendeleev's Periodic Law

Q.

State Mendeleevs periodic law.

Q.

Hydrogen can be placed in group 1 and group 17 of periodic table. Why?

Q. According to Mendeleev's Periodic Law, "The physical and chemical properties of elements are the periodic function of their atomic ".

1. number
2. masses
3. structures
4. models

Q.

Give an example of an element discovered after Mendeleev gave the periodic table

Q.

How did atomic number prove a better basis for the classification of elements?

Q.

In Mendeleev's periodic table, why does tellurium with atomic mass =127.6 appear before iodine having atomic mass 126.9?

Q. What is periodicity?

Q. Statement 1: Mendeleev's periodic law states that the properties of elements are the periodic function of their atomic mass.

Statement 2: The modern periodic law states that the properties of elements are the periodic function of their atomic number.

1. Statement 1 is true but statement 2 is false.
2. Both statement 1 and statement 2 are true.
3. Both statement 1 and statement 2 are false.
4. Statement 1 is false and statement 2 is true.

Q. The first periodic law stated by Mendeleev was :

1. there is no correlation in the properties and atomic weights of the elements
2. the properties of the elements are a periodic function of their atomic numbers
3. the properties of the elements are a periodic function of their atomic weights
4. the properties of the elements are a periodic function of their empirical formula

Q.

Mendeleev's periodic law is based on

1. Atomic Number

2. No of e^-

3. Mass Number

4. Atomic mass

Q.

Which of the following statement is correct in regard to the classification of elements?

1. Elements in the modern periodic table are arranged on the basis of increasing atomic masses.

2. Elements in Mendeleev’s periodic table are arranged on the basis of increasing atomic numbers.

3. Atomic number defines total number of neutrons in the nucleus.

4. The physical and chemical properties of elements are the periodic function of their atomic numbers.

Q.

The drawbacks of Mendeleev's Periodic Table are:

1. Position of Hydrogen was unclear

2. Position of Lanthanides and Actinides

3. Position of Isotopes

4. Anomalous positions of some elements

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

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

Q. Statement 1: Mendeleev's periodic law states that the properties of elements are the periodic function of their atomic mass.

Statement 2: The modern periodic law states that the properties of elements are the periodic function of their atomic number.

1. Both statement 1 and statement 2 are true.
2. Both statement 1 and statement 2 are false.
3. Statement 1 is false and statement 2 is true.
4. Statement 1 is true but statement 2 is false.

Q.

According to Mendeleev’s Periodic Law, the properties of elements are the periodic function of their ___.

1. atomic masses

2. atomic density

3. atomic volume

4. atomic numbers

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

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

Q.

Mendeleev’s Periodic law is based on

1. Atomic Number

2. Atomic mass

3. Number of electron

4. None of the above

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

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

Q.

Which of the following statement is correct with regards to the classification of elements?

1. Elements in modern periodic table are arranged on the basis of increasing atomic masses.

2. Elements in Mendeleev’s periodic table are arranged on the basis of increasing atomic numbers.

3. Atomic number defines total number of neutrons in the nucleus.

4. The physical and chemical properties of elements are the periodic function of their atomic numbers.