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Periodic Classification of Elements (Part I)

Description: Periodic Classification of Elements (Part I) Elements and Compounds
Number of Questions: 25
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Tags: Periodic Classification of Elements (Part I) Elements and Compounds
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Element 'x' belongs to the 18th group of the periodic table. What is the valency of 'x'?

  1. 0

  2. 1

  3. 4

  4. 8


Correct Option: A
Explanation:

Elements belonging to the 18th group of the periodic table have fully filled last valence shell. So, they have zero valency.

According to Mendeleev Periodic Law, properties of elements are a periodic function of their _______.

  1. atomic number

  2. mass number

  3. atomic mass

  4. valency


Correct Option: C

Newlands arranged the elements in the order of their increasing _______.

  1. atomic number

  2. reactivity

  3. atomic masses

  4. valency


Correct Option: C

What is the name of the first scientist who showed the relationship between the properties of elements and their atomic masses?

  1. Lavoisier

  2. Mendeleev

  3. Newlands

  4. Dobereiner


Correct Option: D

Which of the following scientists prepared the long form of periodic table?

  1. Dalton

  2. Mendeleev

  3. Bohr

  4. Rutherford


Correct Option: C

According to Modern Periodic Law, properties of elements are a periodic function of their _______.

  1. atomic number

  2. atomic mass

  3. mass number

  4. valence


Correct Option: A

What does the word 'Octaves' refer to in Newlands Law of Octaves?

  1. Eight

  2. Twelve

  3. Sixteen

  4. Eighteen


Correct Option: A

What is the name of the scientist, who, in 1915, found that the atomic weight of an element never varies?

  1. William Pront

  2. John Dalton

  3. Lavoisier

  4. Do bereiner


Correct Option: A

Which is the shortest period of the periodic table?

  1. 1st

  2. 3rd

  3. 5th

  4. 2nd


Correct Option: A

In Dobereiners classification of elements, how many elements are placed in 1 group?

  1. 2

  2. 3

  3. 7

  4. 17


Correct Option: B

Which of the following scientists gave the 'Law of Octaves'?

  1. Lavoisier

  2. Dobereiner

  3. Newland

  4. Dalton


Correct Option: C

Where are metals located in the modern periodic table?

  1. Left

  2. Centre and right

  3. Left and centre

  4. Right


Correct Option: C

To which block of the periodic table do lanthanides and actinides belong?

  1. S-block

  2. P-block

  3. D-block

  4. F-block


Correct Option: D

Which period of the periodic table is incomplete?

  1. 1st

  2. 5th

  3. 6th

  4. 3rd


Correct Option: C

Which of the following properties of an element can vary?

  1. Atomic number

  2. Atomic mass

  3. Density

  4. None of these


Correct Option: D
Explanation:

Atomic mass of an element can vary.

Which of the following atoms is a chalcogen?

  1. Silcon

  2. Silver

  3. Sulphur

  4. Aluminium


Correct Option: C

Atomic mass of _______ is equal to the average atomic masses of chlorine and iodine.

  1. bromine

  2. fluorine

  3. astatine

  4. strontium


Correct Option: A

Where are metalloid located in the modern periodic table?

  1. Left

  2. Right

  3. Adjacent to noble gases

  4. Between metals and non - metals


Correct Option: D

Chlorine reacts with water to form acid. It is a monovalent element. Under which of the following categories is chlorine classified?

  1. Alkali

  2. Alkaline earth

  3. Noble gas

  4. Halogen


Correct Option: D

In Dobereiner's classification, elements were classified on the basis of their

  1. mass number

  2. atomic number

  3. atomic mass

  4. physical properties


Correct Option: C

Group 1 of the modern periodic table consists of _______ metal(s) and _______ non metal(s).

  1. 7, 0

  2. 6, 1

  3. 5, 2

  4. 4, 3


Correct Option: B

Where are noble gases located in the modern periodic table?

  1. Period 6

  2. Group 8

  3. Period 7

  4. Group 18


Correct Option: D

Which system of classification of elements could not explain the position of isotopes?

  1. Dobereiher's

  2. Newlands Law of Octaves

  3. Mendelleev's Periodic table

  4. Modern periodic table


Correct Option: C

How many elements are present in the 5th period of the periodic table?

  1. 8

  2. 16

  3. 18

  4. 32


Correct Option: D
Explanation:

In the 5th period, there are a total of 32 elements.

The horizontal rows of elements in a modern periodic table are called _______ and the vertical rows of elements in a periodic table are called _______.

  1. periods, groups

  2. groups, periods

  3. lanthanides, actinides

  4. actinides, lanthanides


Correct Option: A
Explanation:

The horizontal rows of elements in a modern periodic table are called periodsĀ and the vertical rows of elements in a periodic table are called groups. There are total 7 periods and 18 groups in modern periodic table.

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