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Selina solutions for Concise Science Chemistry 1 Class 9 ICSE chapter 5 - The Periodic Table [Latest edition]

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Chapters

Concise Science Chemistry 1 Class 9 ICSE - Shaalaa.com

Chapter 5: The Periodic Table

Exercise 5 (A)Exercise 5 (B)Exercise 5 (C)
Exercise 5 (A) [Pages 82 - 102]

Selina solutions for Concise Science Chemistry 1 Class 9 ICSE Chapter 5 The Periodic Table Exercise 5 (A) [Pages 82 - 102]

Exercise 5 (A) | Q 1 | Page 82

What is the need for classification of elements?

Exercise 5 (A) | Q 2 | Page 82

What was the basis of the earliest attempts made for classification and grouping of elements?

Exercise 5 (A) | Q 3.1 | Page 82

A, B and C are the elements of a Dobereiner's triad. If the atomic mass of A is 7 and that of C is 39, what should be the atomic mass of B?

Exercise 5 (A) | Q 3.2 | Page 82

Why was Dobereiner's triad discarded?

Exercise 5 (A) | Q 4 | Page 82

Explain 'Newland's Law of Octaves.' Why was the law discarded?

Exercise 5 (A) | Q 5 | Page 82

Did Dobereiners triads also exist in the columns of Newland's Octaves? Compare and find out.

Exercise 5 (A) | Q 6.1 | Page 82

Lithium, sodium, and potassium elements were put in one group on the basis of their similar properties. What are those similar properties?

Exercise 5 (A) | Q 6.2 | Page 82

The elements calcium, strontium and barium were put in one group or family on the basis of their similar properties.

What were those similar properties?

Exercise 5 (A) | Q 7.1 | Page 82

What was Mendeleev's basis for the classification of elements?

Exercise 5 (A) | Q 7.2 | Page 82

Mendeleev's contributions to the concept of a periodic table laid the foundation for the Modern Periodic Table. Give reasons.

Exercise 5 (A) | Q 8 | Page 82

State Mendeleev's periodic law.

Exercise 5 (A) | Q 9.1 | Page 82

Use Mendeleev's Periodic Table to predict the formula of hydrides of carbon and silicon.

Exercise 5 (A) | Q 9.2 | Page 82

Use Mendeleev's Periodic Table to predict the formula of oxides of potassium, aluminum, and barium.

Exercise 5 (A) | Q 10 | Page 82

Which group of elements was missing from Mendeleev's original periodic table?

Exercise 5 (A) | Q 10.3 | Page 102

How the reaction can proceed continuously? 

Exercise 5 (A) | Q 11 | Page 82

State the merits of Mendeleev's classification of elements.

Exercise 5 (A) | Q 12 | Page 82

Why did Mendeleev's leave some gaps in his periodic table os elements? Explain your answer with an example.

Exercise 5 (A) | Q 13 | Page 82

The atomic number of an element is more important to the chemist than its relative atomic mass. Why?

Exercise 5 (A) | Q 14 | Page 82

Consider the following elements: Be, Li, Na, Ca, K. Name the elements of (a) same group (b) same period.

Exercise 5 (A) | Q 15.1 | Page 82

Name an element whose properties were predicted on the basis of its position in Mendeleev's periodic table.

Exercise 5 (A) | Q 15.2 | Page 82

Name two elements whose atomic weights were corrected on the basis of their positions in Mendeleev's periodic table.

Exercise 5 (A) | Q 15.3 | Page 82

How many elements were known at the time of Mendeleev's classification of elements?

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Exercise 5 (B) [Page 89]

Selina solutions for Concise Science Chemistry 1 Class 9 ICSE Chapter 5 The Periodic Table Exercise 5 (B) [Page 89]

Exercise 5 (B) | Q 1.1 | Page 89

State the modern periodic law.

Exercise 5 (B) | Q 1.2 | Page 89

How many periods and groups are there in the modern periodic table?

Exercise 5 (B) | Q 2 | Page 89

What is the main characteristic of the last elements in the periods of a periodic table? What is the general name of such elements?

Exercise 5 (B) | Q 3.1 | Page 89

What is meant in the periodic table by a group?

Exercise 5 (B) | Q 3.2 | Page 89

What is meant in the periodic table by a period?

Exercise 5 (B) | Q 4 | Page 89

From the standpoint of atomic structure, what determines which elements will be the first and which the last in a period of the periodic table?

Exercise 5 (B) | Q 5.1 | Page 89

What are the following group known as?

Group 1

Exercise 5 (B) | Q 5.1 | Page 89

What are the following group known as?

Group 17

Exercise 5 (B) | Q 5.1 | Page 89

What are the following group known as?

Group 18 

Exercise 5 (B) | Q 5.2 | Page 89

Name two elements of each group.

Exercise 5 (B) | Q 6.1 | Page 89

What is the number of elements in the 1st period?

Exercise 5 (B) | Q 6.2 | Page 89

What is the number of elements in the 3rd period, of the modern periodic table?

Exercise 5 (B) | Q 7.1 | Page 89

How does number of (i) valence electrons (ii) valency; vary on moving from left to right in the third period of a periodic table?

Exercise 5 (B) | Q 7.2 | Page 89

How does number of (i) valence electrons (ii) valency; vary on moving from left to right in the second period of a periodic table?

Exercise 5 (B) | Q 8 | Page 89

How do atomic structures (electron arrangements) change in a period with an increase in atomic numbers moving left to right?

Exercise 5 (B) | Q 9.1 | Page 89

This question refers to elements of the periodic table with atomic numbers from 3 to 18. In the table below, some elements are shown by letters, even though the letters are not the usual symbols of the elements.

3

4

5

6

7

8

9

10

A

B

C

D

E

F

G

H

11

12

13

14

15

16

17

18

I

J

K

L

M

N

O

P

Which of these is:

  1. a noble gas?
  2. a halogen?
  3. an alkali metal?
  4. an element with valency 4?
Exercise 5 (B) | Q 9.2 | Page 89

This question refers to elements of the periodic table with atomic numbers from 3 to 18. In the table below, some elements are shown by letters, even though the letters are not the usual symbols of the elements.

3

4

5

6

7

8

9

10

A

B

C

D

E

F

G

H

11

12

13

14

15

16

17

18

I

J

K

L

M

N

O

P

If A combines with F, what would be the formula of the resulting compound?

Exercise 5 (B) | Q 9.3 | Page 89

This question refers to elements of the periodic table with atomic numbers from 3 to 18. In the table below, some elements are shown by letters, even though the letters are not the usual symbols of the elements.

3

4

5

6

7

8

9

10

A

B

C

D

E

F

G

H

11

12

13

14

15

16

17

18

I

J

K

L

M

N

O

P

What is the electronic configuration of G?

Exercise 5 (B) | Q 10 | Page 89

Sodium and aluminum have atomic numbers 11 and 13, respectively. They are separated by one element in the periodic table and have valencies 1 and 3 respectively. Chlorine and potassium are also separated by one element in the periodic table (their atomic numbers being 17 and 19, respectively) and yet both have valency 1. Explain. 

Exercise 5 (B) | Q 11 | Page 89

Helium is an unreactive gas and neon is a gas of extremely low reactivity. What, if anything, do their atoms have in common.

Exercise 5 (B) | Q 12.1 | Page 89

 In which part of a group would you separately expect the elements to have the greatest metallic character

Exercise 5 (B) | Q 12.2 | Page 89

In which part of a group would you separately expect the elements to have the largest atomic size?

Exercise 5 (B) | Q 13 | Page 89

What happens to the number of valence electrons in atoms of elements as we go down a group of the periodic table?

Exercise 5 (B) | Q 14.1 | Page 89

The position of elements A, B, C, D and E in the periodic table are shown below:

Group 1

Group 2

Group 17

Group 18

 

 

 

D

 

B

C

 

A

 

 

E

State which is metals, non-metals, and noble gas in this table.

Exercise 5 (B) | Q 14.2 | Page 89

The position of elements A, B, C, D and E in the periodic table are shown below:

Group 1

Group 2

Group 17

Group 18

 

 

 

D

 

B

C

 

A

 

 

E

State which is most reactive (i) metal (ii) non-metal

 

Exercise 5 (B) | Q 14.3 | Page 89

The position of elements A, B, C, D and E in the periodic table are shown below:

Group 1

Group 2

Group 17

Group 18

 

 

 

D

 

B

C

 

A

 

 

E

Which type of ion will be formed by elements A, B, and C.

 

Exercise 5 (B) | Q 14.4 | Page 89

 The position of elements A, B, C, D and E in the periodic table are shown below:

Group 1

Group 2

Group 17

Group 18

 

 

 

D

 

B

C

 

A

 

 

E

Which is larger in size (i) D or E (ii) B or C

Exercise 5 (B) | Q 15 | Page 89

Write the electronic configuration of element 17T35.

  1. What is the group number of T?
  2. What is the period number of T?
  3. How many valence electrons are there in an atom of T?
  4. What is the valency of T?
  5. Is it a metal or non-metal?
  6. State number of protons and neutrons in T.
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Exercise 5 (C) [Pages 94 - 95]

Selina solutions for Concise Science Chemistry 1 Class 9 ICSE Chapter 5 The Periodic Table Exercise 5 (C) [Pages 94 - 95]

Exercise 5 (C) | Q 1 | Page 94

Element P has atomic number 19. To which group and period, does P belong? Is it a metal or a non-metal? Why?

Exercise 5 (C) | Q 2.1 | Page 94

An element belongs to the third period and Group IIIA (13) of the periodic table. State: the number of valence electrons,

Exercise 5 (C) | Q 2.2 | Page 94

An element belongs to the third period and Group IIIA (13) of the periodic table. State: the valency,

Exercise 5 (C) | Q 2.3 | Page 94

An element belongs to the third period and Group IIIA (13) of the periodic table. State: if it is a metal or non-metal?

Exercise 5 (C) | Q 2.4 | Page 94

An element belongs to the third period and Group IIIA (13) of the periodic table. State: the name of the element. 

Exercise 5 (C) | Q 3.01 | Page 94

Name and state the following with reference to the elements of the first three periods of the periodic table.

Noble gas with duplet arrangement of electrons.

Exercise 5 (C) | Q 3.02 | Page 94

Name and state the following with reference to the elements of the first three periods of the periodic table.

Metalloid in Period 3.

Exercise 5 (C) | Q 3.03 | Page 94

Name and state the following with reference to the elements of the first three periods of the periodic table.

Valency of elements in Group 14 and 15.

Exercise 5 (C) | Q 3.04 | Page 94

Name and state the following with reference to the elements of the first three periods of the periodic table.

Noble gas having electronic configuration: 2, 8, 8.

Exercise 5 (C) | Q 3.05 | Page 94

Name and state the following with reference to the elements of the first three periods of the periodic table.

Group whose elements have zero valencies.

Exercise 5 (C) | Q 3.06 | Page 94

Name and state the following with reference to the elements of the first three periods of the periodic table.

A covalent compound formed by an element in period 2 and a halogen.

Exercise 5 (C) | Q 3.07 | Page 94

Name and state the following with reference to the elements of the first three periods of the periodic table.

Non-metallic element present in Period 3 of Groups 15 and 16

Exercise 5 (C) | Q 3.08 | Page 94

Name and state the following with reference to the elements of the first three periods of the periodic table.

An electrovalent compound formed by an alkaline earth metal and a halogen.

Exercise 5 (C) | Q 3.09 | Page 94

Name and state the following with reference to the elements of the first three periods of the periodic table.

Bridge elements of Period 3 of Group 1,2 and 3.

Exercise 5 (C) | Q 3.1 | Page 94

Name and state the following with reference to the elements of the first three periods of the periodic table.

Alkali metal in period 3 dissolves in the water giving a strong alkali.

Exercise 5 (C) | Q 3.11 | Page 94

Name and state the following with reference to the elements of the first three periods of the periodic table.

Typical elements of Groups 14 and 15.

Exercise 5 (C) | Q 3.12 | Page 94

Name and state the following with reference to the elements of the first three periods of the periodic table.

Alkaline earth metal in period 3.

Exercise 5 (C) | Q 4 | Page 94

Match column A with column B.

 

Column A

Column B

(a) Element short by 1 electron in octet

(i) Transition elements

(b) Highly reactive metals

(ii) Noble gases

(c) Non-reactive elements

(iii) Alkali metals

(d) Elements of groups 3 to 12

(iv) Alkaline earth metals

(e) Radioactive elements

(v) Halogens

(f) Elements with 2 electrons in the outermost orbit

(vi)Actinides

 

 

Exercise 5 (C) | Q 5 | Page 94

Complete the table:

Atomic number

Element

Electronic configuration

Select an element of the same group

11

Sodium

 

(Ca/N/K)…

15

Phosphorus

 

(Ba/N/Rb)…

16

Sulphur 

 

(F/Cl/O)…

9

Fluorine

 

(Ca/Cl/K)…

 

Exercise 5 (C) | Q 6.1 | Page 94

Write down the word that will correctly complete the following sentence:

The relative atomic mass of a light element up to calcium is approximately_____ its atomic number

Exercise 5 (C) | Q 6.2 | Page 94

Write down the word that will correctly complete the following sentence:

The horizontal rows in a periodic table are called _____.

Exercise 5 (C) | Q 6.3 | Page 94

Write down the word that will correctly complete the following sentence:

Going across a period left to right, atomic size _____.

Exercise 5 (C) | Q 6.4 | Page 94

Write down the word that will correctly complete the following sentence:

Moving left to right in the second period, the number of valence electrons _____. 

Exercise 5 (C) | Q 6.5 | Page 94

Write down the word that will correctly complete the following sentence:

Moving down in the second group, number of valence electrons___________.

Exercise 5 (C) | Q 7.1 | Page 94

Name the alkali metals, How many electron(s) they have in their outermost orbit.

Exercise 5 (C) | Q 7.2 | Page 94

Take any one alkali metal and write its reaction with (i)oxygen (ii)water (iii)acid.

Exercise 5 (C) | Q 8.1 | Page 95

Name the method by which alkali metals can be extracted.

Exercise 5 (C) | Q 8.2 | Page 95

What is the colour of the flame of sodium and potassium?

Exercise 5 (C) | Q 9.1 | Page 94

An element A has 2 electrons in its fourth shell. State:

its atomic number

Exercise 5 (C) | Q 9.2 | Page 95

An element A has 2 electrons in its fourth shell. State:

its electronic configuration

Exercise 5 (C) | Q 9.3 | Page 95

An element A has 2 electrons in its fourth shell. State:

its valency

Exercise 5 (C) | Q 9.4 | Page 95

An element A has 2 electrons in its fourth shell. State:

position in the periodic table

Exercise 5 (C) | Q 9.5 | Page 95

An element A has 2 electrons in its fourth shell. State:

is it a metal or non-metal

Exercise 5 (C) | Q 9.6 | Page 95

An element A has 2 electrons in its fourth shell. State:

is it an oxidising or reducing agent 

Exercise 5 (C) | Q 10.1 | Page 95

Name the first three alkaline earth metals.

Exercise 5 (C) | Q 10.2 | Page 95

Write the reactions of the first three alkaline earth metals with dilute hydrochloric acid.

Exercise 5 (C) | Q 11.2 | Page 95

Write the electronic configuration of the first two alkaline earth metals.

Exercise 5 (C) | Q 11.3 | Page 95

How do alkaline earth metals occur in nature?

Exercise 5 (C) | Q 12.1 | Page 95

 Give reason:

Alkali metals are kept in an inert solvent.

Exercise 5 (C) | Q 12.2 | Page 95

 Give reason:

Alkali metals and halogens do not occur free in nature.

Exercise 5 (C) | Q 12.3 | Page 95

 Give reason:

Alkali and alkaline earth metal compounds usually form electrovalent compounds.

Exercise 5 (C) | Q 12.4 | Page 95

 Give reason:

Inert gases do not form compounds.

Exercise 5 (C) | Q 13.1 | Page 95

Arrange the following:

Elements of group 1, in increasing order of reactivity

Exercise 5 (C) | Q 13.2 | Page 95

Arrange the following:

Elements of group 17, in decreasing order of reactivity

Exercise 5 (C) | Q 13.3 | Page 95

Arrange the following:

He, Na, Mg ( increasing order of melting point)

Exercise 5 (C) | Q 13.4 | Page 95

Arrange the following:

Chlorine, sodium, magnesium (increasing reducing character)

Exercise 5 (C) | Q 14.1 | Page 95

State the nature of compounds formed when group 17 elements combine with (i) metals (ii) non-metals.

Exercise 5 (C) | Q 14.2 | Page 95

Why group 17 elements are highly reactive?

Exercise 5 (C) | Q 15.1 | Page 95

How many electrons do inert gases have in their valence shells?

Exercise 5 (C) | Q 15.2 | Page 95

Name an element of group 18 which can form compounds.

Exercise 5 (C) | Q 16.1 | Page 95

Name the gas used in:

Filling balloons

Exercise 5 (C) | Q 16.2 | Page 95

Name the gas used in:

Light bulbs

Exercise 5 (C) | Q 16.3 | Page 95

Name the gas used in:

Bright colour advertising light works

Exercise 5 (C) | Q 17.1 | Page 95

What is the name given to group 17 elements? Why are they called so?

Exercise 5 (C) | Q 17.2 | Page 95

Comment on the (i) reactivity (ii) colour (iii) physical state of group 17 elements.

Exercise 5 (C) | Q 18 | Page 95

Two elements P and Q belong to the same period of the modern periodic table and are in group 1 and group 2, respectively. Compare the following characteristics in the tabular form.

  1. Number of electrons in their atoms
  2. Their tendency to lose electrons
  3. Their metallic characters
  4. Formation of their oxides
  5. Formulae of their chlorides
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Chapter 5: The Periodic Table

Exercise 5 (A)Exercise 5 (B)Exercise 5 (C)
Concise Science Chemistry 1 Class 9 ICSE - Shaalaa.com

Selina solutions for Concise Science Chemistry 1 Class 9 ICSE chapter 5 - The Periodic Table

Selina solutions for Concise Science Chemistry 1 Class 9 ICSE chapter 5 (The Periodic Table) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CISCE Concise Science Chemistry 1 Class 9 ICSE solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. Selina textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Concise Science Chemistry 1 Class 9 ICSE chapter 5 The Periodic Table are Mendeleev’s Periodic Table, The Modern Periodic Table, Advantage and Disadvantage of Modern Periodic Table, Types of Element: Metals, Types of Element: Metals, Modern Periodic Law, Advantage and Disadvantage of Modern Periodic Table, Study of Specific Groups, Dobereiner’s Triads, Newland's Law of Octaves, Uses of Periodic Table, Periodic Properties.

Using Selina Class 9 solutions The Periodic Table exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in Selina Solutions are important questions that can be asked in the final exam. Maximum students of CISCE Class 9 prefer Selina Textbook Solutions to score more in exam.

Get the free view of chapter 5 The Periodic Table Class 9 extra questions for Concise Science Chemistry 1 Class 9 ICSE and can use Shaalaa.com to keep it handy for your exam preparation

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