Kerala SCERT Class 10 Chemistry Periodic Table and Electronic Configuration Question Answer
Kerala SCERT Class 10 Chemistry Chapter 1 Periodic Table and Electronic Configuration Question Answer Solution Here. Kerala Board Class 10 Students can find Here 1st Chapter Periodic Table and Electronic Configuration Notes provide by our Teacher. Important Question Answer from Chapter 1 Periodic Table and Electronic Configuration.
- Board- Kerala Board.
- Class – 10.
- Subject – Chemistry Part 1
- Chapter – 1
- Chapter Name – Periodic Table and Electronic Configuration.
- Topic – Question Answer Solution.
Q.1) MCQ
01) Valency of 2nd group should be……
a) 1
b) 4
c) 2
d) 3
02) The number of subshells in the ‘M’ shell.
a) 1
b) 2
c) 3
d) 4
03) S, P ,D, F are the subshells of which shell.
a) K
b) L
c) M
d) N
04) Maximum no. of electronic accommodated in ‘M’ shell.
a) 8 b) 10
c) 18 d) 20
05) Electronic configuration of is Li is.
a) 1S22S2
b) 1S22S2
d) 1S1
d) 1S2
06) atomic number of Ca is.
a) 17 b) 18
c) 19 d) 20
07) Blocks in the periodic table are.
a) 2 b) 3
c) 4 d) 5
08) Elements in group 3 to 12 belongs to…….
a) s – block b) p – block
d) d – block c) f – block
09) Valency of Group two ( 2nd group).
a) 1 b) 2
c) 3 d) 4
10) Oxidation state of Group One is…….
a) +2 b) +1
c) +3 D) +4
11) P block starts in periodic table after Group _____.
a) Group = 11
b) Group = 12
c) Group = 13
d) Group = 14
12) Block which contain metals, non-metals, metalloids and noble Gases is…….
a) p- block
b) d- block
c) s- block
d) f – block
13) Transition elements are present in ……….
a) d – block
b) s – block
c) p – block
d) f – block
14) Coloured salts of transition elements having specific colour due to….
a) Transition non-metal
b) Anion
c) Transition metal ion
d) None of the above
15) Which block elements shows catalytic property.
a) s – block
b) p – block
c) d – block
d) f – block
Q.2) Very Short Answers.
01) What is catalytic property of transitions elements?
02) Write atomic no. and electronic configuration of Mn?
03) Find oxidation state of Fe in FeCl3?
04) State maximum no. of electrons that can be accommodated S, P, D, F subshell?
05) State electronic configuration of ‘X’ atom having atomic number 13,
Find the element?
06) Write subshell electronic configuration of 24 Cr?
07) Define transition element?
Q.3) Short Answer
01) List out the elements in ‘S’ block?
02) Complete the table
Atomic Number | Electronic Configuration |
11 | |
12 | |
13 | |
14 | |
15 |
03) The element ‘X’ in group 14 has 3 shells if So,
a) Find the element and name it?
b) Write subshell electronic configuration?
04) When Last electron filled in 3rd subshell having electronic
Configuration 3d7, then answer the following.
a) atomic number =
b) Block =
c) Group number =
d) Configuration =
05) Complete the table.
Element | Subshell electronic
configuration |
Period number |
4Be(4) | ||
6C(6) | ||
Na(11) | ||
K(1a) |
06) Why Cr (24) having peculiarities configuration?
07) List out Characteristics of S-block elements?
Q.4) Long Answer Questions.
01) The element ‘X’ in group 8 and period 4 having atomic number 26 then,
a) find and name the element.
b) Write its subshell electronic configuration.
c) Block?
02) How does Fe change to Fe2+, write its configuration?
03) The element ‘Y’ in group 16 has 3 shells if so,
a) Write subshell electronic configuration.
b) Write its period number.
c) Write its compounds when reach with oxygen.
d) Period no. of S is 3.
e) SO2, SO3, SO4.
04) Complete the table.
Element | Outermost electronic configuration | Atomic no. | Period | Group |
….. | 3S23P4 | ….. | 3 | ….. |
….. | 2S22P4 | ….. | 2 | ….. |
….. | 2S22P2 | ….. | 2 | ….. |
….. | 3d54S1 | 24 | ….. | ….. |
….. | 3d84S2 | 28 | ….. | ….. |
05) Complete the table.
Element | Symbol | State at STP | Oxidation state | Chemical reaction with hydrides |
Fluorine | ….. | ….. | -1 | HF |
….. | Cl | ….. | -1 | ….. |
Bromine | ….. | Liquid | ….. | ….. |
Iodine | ….. | ….. | ….. | ….. |
06) Write note on coloured compounds?
PERIODICTABLE AND ELECTRONIC CONFIGURATION
‘’Answer Sheet’’
Q.1) MCQ
1) c) = 2
2) c) = 3
3) d) = N
4) c) = 18
5) b) = 1S22S1
6) d) = 20
7) c) = 4
8) c) = d = block
9) b) = 2
10) b) = +1
11) b) = Group 12
12) a) = p = block
13) a) = d = block
14) c) = Transition metal ion.
15) c) = d = block
Q,2) Very Short Answers.
1) Catalysts are substances which influence speed of chemical reaction
Without themselves undergoing any permanent chemical change
Transition elements are capable of showing different oxidation
States hence shows Catalytic property.
2) Mn atomic number = 25
Electronic configuration = 1S22S22p63S23p64S23d5
3) Oxidation state of Cl = -1
FeCl3
x+(-1) x 3 = 0
x – 3 = 0
x = 3
x = +3
oxidation state of Fe in FeCl3 in +3
4) s = 2
p = 6
d = 10
f = 14
5) The element having atomic number 13 is Aluminium.
Electronic configuration
Al (13):- 1S22S22p63S23p1
6) Cr (24) = 1S22S22p63S23p63d54S1
7) Transition elements are the elements present in d-block contain Different oxidation states.
Q.3) Short Answers.
1) H, Li, Be, Na, Mg, k, Ca, Rb, Sr, Cs, Ba, Fr, Ra .
Atomic Number | Electronic Configuration |
11 | 1S22S22p63S1 |
12 | 1S22S22p63S2 |
13 | 1S22S22p63S23p1 |
14 | 1S22S22p63S23p2 |
15 | 1S22S22p63S23p3 |
2)
Atomic Number | Electronic Configuration |
11 | 1S22S22p63S1 |
12 | 1S22S22p63S2 |
13 | 1S22S22p63S23p1 |
14 | 1S22S22p63S23p2 |
15 | 1S22S22p63S23p3 |
3) a) Silicon
b) Si (14) = 1S22S22p63S23p2
4) a) 27
b) d = block
c) 9
d) 1S22S22p63S23p63d74S2
5) complete the table
Element | Subshell Electronic configuration | Period number |
4Be(4) | 1S22S2 | 2 |
6C (6) | 1S22S22p2 | 2 |
Na (11) | 1S22S22p63S1 | 3 |
K (19) | 1S22S22p63S23p64S1 | 3 |
6) Cr (24) :- 1S22S22p63S23p63d54S1
The d – subshell can accommodate maximum 10 electrons.
The completely filled configuration (d10) or half filled (d5)
Configuration of this subshell is more stable than d4S2
7) 1) More metallic character.
2) Less ionization energy.
3) Less electronegativity.
4) good reducing agents.
5) highly electropositive.
Q.4) Long Answer Questions.
1) a) Iron (Fe)
b) Fe (26) :- 1S22S22p63S23p63d64S2
c) d – block
2) Electrons from outermost S-Subshell are last first and form Fe2+
Fe (26) :- 1S22S22p63S23p63d64S2
Fe2+ :- 1S22S22p63S23p63d64S0
3) a) Element is S
S (16):- 1S22S22p63S23p4
b) period no. of S is 3.
c) SO2, SO3, SO4
Element | Outermost electronic configuration | Atomic no. | Period | Group | Block |
S | 3S23P4 | 16 | 3 | 16 | p |
O | 2S22P4 | 8 | 2 | 16 | p |
C | 2S22P2 | 6 | 2 | 14 | P |
Cr | 3d54S1 | 24 | 4 | 6 | d |
Ni | 3d84S2 | 28 | 4 | 10 | d |
4) Complete the table.
Element | Outermost electronic configuration | Atomic no. | Period | Group | Block |
S | 3S23P4 | 16 | 3 | 16 | p |
O | 2S22P4 | 8 | 2 | 16 | p |
C | 2S22P2 | 6 | 2 | 14 | P |
Cr | 3d54S1 | 24 | 4 | 6 | d |
Ni | 3d84S2 | 28 | 4 | 10 | d |
5) Complete the table.
Element | Symbol | State at STP | Oxidation state | Chemical reaction with hydrides |
Fluorine | F | Gas | -1 | HF |
Chlorine | Cl | Gas | -1 | HCl |
Bromine | Br | Liquid | -1 | HBr |
Iodine | I | Solid | -1 | HI |
6) Transition metal ions are usually colouredcompounds. Most Of the colouredsalts are compounds of transitions elements.
The Colour is due to the presence of transition metal ion Present in these compounds. These compounds of transitions Elements are used for giving colour to glasses and in oil Paintings.
e.g. 1) Copper sulphate(CuSO4)
2) Cobalt nitrate Co (NO3)2
3) Potassium permanganate (KMnO4)
4) Ferrous sulphateFeSO4
5) Copper nitrate Cu(NO3)2
6) Chromium Oxide Cr2O3
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