Periodic Table Class-10 Goyal Brothers ICSE Chemistry Solutions Ch-1

Periodic Table Class-10 Goyal Brothers ICSE Chemistry Solutions Chapter 1. Step by Step Solutions of Eercise-1 , Eercise-2 and Objective Type Questions .Solved Questions of Goyal Brothers Prakashan Chemistry Chapter-1 Periodic Table Properties for ICSE Class 10.   Visit official Website CISCE  for detail information about ICSE Board Class-10 Chemistry .

Periodic Table Class-10 Goyal Brothers ICSE Chemistry Solutions

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-: Select Topics :-

Eercise-1

 Eercise-2

Objective Type Questions

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Eercise-1 

Periodic Table Class-10 Goyal Brothers ICSE Chemistry Solutions

Questin-1

(a) Who prepared the modern periodic table?

(b) Define : (i) Modern Periodic Law (ii) Modern Periodic Table,

Answer

(a) H.G.J. Moseley prepared the modern periodic table

(b)

(i) Modern Periodic Law

The modern Periodic law can be stated as: “The physical and chemical properties of the elements are periodic functions of their atomic numbers”

(ii) Modern Periodic Table,

The modern periodic table is used to organize all the known elements. Elements are arranged in the table by increasing atomic number. In the modern periodic table, each element is represented by its chemical symbol. The number above each symbol is its atomic number.

Question-2
With reference to the long form of the periodic table, fill in the blank spaces with ..

………………………..

Answer
(a) The chemical properties of elements are the periodic function of their …….atomic number…
(b) The serial number of an element in the periodic table is also its ..atomic number……………
(c) The number of electrons in the valence shell of an atom represents its ……….Valence electron….
(d) The number of electron shells around the nucleus of an atom represents its ….Period.in periodic table.
(e) ………Alkali…._ metals and alkaline ..Earth………… metals are placed in the groups on the left hand side of the periodic table,
(f) ……..Inert…… elements are placed on the right hand side of the periodic table.
(g) the Element.Occupying left and right wing vertical columns are called ………..Normal…….elements.
(h) Noble ………gas………. are placed in………18th…….group in the last …Group……of periodic table
(i) ……….Transitional…..elements are accommodated in the middle of the periodic table in ….second…….  Series
(j) The first period has …..2 Elements and called very short period

(k) The second and third periods have ….8……….elements and are called …..…Short Period..…
(l) The fourth and fifth periods have……18 elements and called Long Period

Question-3
Give the name and symbol of the following elements which occupy the following positions in
(a) period 2, group 13

(b) period 3, group 17

Answer

(a) Aluminium

(b)  Chlorine

Question-4
Name two alkali metals, To which group do they belong?

Answer

Lithium and Sodium are alkali metals they belong to group first.

Question-5
Name two alkaline earth metals, To which group do they belong?

Answer

Be and Mg are alkali metals they belong to group second.

Question-6
Name two elements of 17 group. State the common name of this group of elements.

Answer

Two element of group 17 are chlorine and bromine, common name of this group is Halogen

Question-7
Silicon (at. No. 14) and phosphorus (at. No. 15) belong to the same period of the periodic table………………

Answer

Silicon (at. No. 14)- 2,8,4

phosphorus (at. No. 15)- 2,8,5.It occur in third period.

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 Eercise-2 

Periodic Table Class-10 Goyal Brothers ICSE Chemistry Solutions

Question-1 

Answer the following questions with respect to the long form of PT
(i) What do you understand by the term period?
(ii) What are the total number of periods in this table?

(iii) which period is the shortest name the element in this period

(iv) How many periods are called short periods? Give their period ……….
(v) How many periods are called long periods? How many element…….

vi) How many periods are called very long periods?

Answer

(i)  the term period is horizontal row in PT
(ii) the total number of periods in this table is seven

(iii)  the shortest name the element in this period is first

(iv) Second and third periods are called short periods
(v) 4th and 5th periods are called long periods? 18 element…in each….

vi) 6th and 7th periods are called very long periods?

Question-2

(a) what do you understand by term group in periodic..table
(b) How many groups are in the long form of the periodic table

Answer

(a) Group, in chemistry, a set of chemical elements in the same vertical column of the periodic table. The elements in a group have similarities in the electronic configuration of their atoms, and thus they exhibit somewhat related physical and chemical properties

(b) 18 group

Question 3

Metallic property change to non metallic property from left to right in a period explain

Answer

Hence, the tendency of the element to lose electrons decreases. This results in decrease in metallic character. Furthermore, the tendency of an element to gain electrons increases with increase in effective nuclear charge, so non– metallic character increases on moving from left to right in a period

Question-4.

(a) bigger the atomic size more .metallic is an element explain..

(b) Name

(i)Name the most metallic

(ii) Name the least metallic

Answer

(a) Metallic character increases as you move down a group because the atomic size is increasing. … Electron shielding causes the atomic radius to increase thus the outer electrons ionizes more readily than electrons in smaller atoms

(b)

(i)Name the most metallic – Ciesium

(ii) Name the least metallic- Boron

Question-5

write .the name of element in the ascending order of their atomic size

a) group 1st

b) group 17

Answer

a) group 1st- H , Li,Na , K, Rb, Cs,Fr

b) group 17 -Fl, Cl , Br ,I, At , Ts

Question-6

(a)  what do you mean by the term…electronegativity

(b) write the name of all elements in the third of the long form of periodic table

Answer

(a )The tendency of an atom in a molecule to attract the shared pair of electrons towards itself is known as electronegativity

(b) Na, Mg , Al , Si, P, S , Cl ,Ar

Question-7

among ……………Pick element which are ….
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(i) most electropositive (ii) most electronegative (iii) noble gases.

Be. B, C, N, O, F, Ne, Na, Mg, Al, Si, P. S, CI, Ar, K, Ca. ,

Answer

(i) most electropositive- K

(ii) most electronegative-F,

(iii) noble gases.-Ar,

Question-8

how  is the atomic size of sodium related to (i) magnesium (i) potassium

Answer

Size of potassium is more than magnesium

Question-9

arrange the following sets of elements in the increasing order of their atomic size.

(a) K, Li, Na (b) O, C, N.

Answer

(a)  Li, Na, K

 (b) O,  N., C

Question-10

pick  …………. smallest size ………with reason..

Na, Cl, Si, Ar

Answer

Cl,  Atomic size decrease from left to right in a Period except inert gas

Question-11

Explain,Halogen have a …very strong electron affinity.

Question-12

Explain  why reducing power of elements increase, on moving down a group.

Question-13

Explain, why reducing power of element decrease on moving from left to right in a period.

Question-14
Explain why element lying on  extreme right of the periodic table are strong non-metals, but those lying on .extreme left are strong metals.

Question-15
Explain, why metallic character of an element increases while moving down a group

Question-16

explain, why. non metallic charterer of the element increase on moving from left to right in a PT

Question-17

(a) what do you understand by term electron affinity.

(b) Does electron affinity. represent energy absorbed or energy release

(c) name the element having highest  electron affinity.

(d)Arrange Cl, F, I ,Br in increasing order of electron affinity

Answer

(a) –Electron affinity is defined as the change in energy (in kJ/mole) of a neutral atom (in the gaseous phase) when an electron is added to the atom to form a negative ion. In other words, the neutral atom’s likelihood of gaining an electron

(b)  electron affinity. represent energy energy release

(c) name the element having highest  electron affinity.—Cl

(d) , I ,Br , Cl , F in increasing order of electron affinity

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Objective Type Questions

Periodic Table Class-10 Goyal Brothers ICSE Chemistry Solutions

I. multiple Choice Questions:

Choose the correct answer from the answer given below

1. (c) Remain same
2. (c) -1
3. (a) metals
4. (d) Francium
5. (c) Florine
6. (a) Seven
7. (b) third period seventeen group
8.  (c) Phosphorus
9. (d) Chlorine
10. (a) Same number of electron shells
11. (c) electronegative charterer increase
12. (d) All of these
13. (b) increase
14. (a) remain same
15. (a) increase
16. (b) decrease
17. (a) increase
18. (d) both (a) and (b)
19. (b) increase
20. (a) decrease
21. (a) increase
22. (c) electron affinity
23. (c) decrease
24. (a) increase
25. (c) decrease
26. (d) F,H,E and G

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II Fill in the blanks space with the choice given in bracket

1. ………….atomic number …………
2. ………….middle …………
3. ………….right …………
4. ………….end …………
5. ………….normal …………
6. …………group …………
7. ………….horizontal…………
8. ………….seven …………
9. …………shell number …………
10. ………. alkali metal…………
11. ………….halogen………..
12.  ……….third………….
13. ………….13…………
14. ………..first period………
15. …………..same………….
16. ……………decrease
17. ………….. more…………
18. …………decrease………..
19. …………. increase…………
20. …………increase…………
21. ………….decrease…………..
22. ……………increase……….
23. ………..decrease……….
24. …………..least………….
25. ……………decrease………….

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III Choose from the following list as to what match’s the description given below

1.  modern periodic law
2. period
3. group
4. normal
5. rare gases
6. alkali metal
7. halogen
8. transition
9. lanthanide
10. actinide
11. ionization potential
12. electronegativity
13. electron affinity

–:  End of Goyal Brothers Periodic Table Properties ICSE Class-10 :–

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