CHEMISTRY CH11 Atomic Structure - Tamil Nadu Board STD 9 Science Questions - Vidyadip

Question types

CHEMISTRY CH11 Atomic Structure question types

71 questions across 9 question groups — pick any mix to generate a Science paper with step-by-step answer keys.

71

Questions

9

Question groups

5

Question types

MCQ

Assertion (A) & Reason (B) MCQ

[2 Mark Questions]

Match The Following.

[4 Mark Questions]

[7 marks Questions]

Fill In The Blanks.

[ 1 mark questions ]

true or false.[1 Mark each]

Sample Questions

CHEMISTRY CH11 Atomic Structure questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1MCQ1 Mark

The correct electronic configuration of potassium is ______.

A
2,8,9
B
2,8,1
C
2,8,8,1
D
2,8,8,3

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Q 2MCQ1 Mark

The number of protons, neutrons and electrons present respectively in ${ }_{35}^{80} Br$ are

A
80, 80, 35
B
35, 55,80
C
35, 35, 80
D
35, 45, 35

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Q 3MCQ1 Mark

The term nucleons refer to ______.

A
protons and electrons
B
only neutrons
C
electrons and neutrons
D
protons and neutrons

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Q 4MCQ1 Mark

Change in the number of neutrons in an atom changes it to ______.

A
an ion
B
an isotope.
C
an isobar
D
another element

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Q 5MCQ1 Mark

Among the following the odd pair is

A
${ }_8^{18} O ,{ }_9^{19} F$
✓
${ }_{18}^{40} Ar ,{ }_7^{14} N$
C
${ }_{14}^{30} Si _{,}{ }_{15}^{31} P$
D
${ }_{20}^{40} Cr ,{ }_{19}^{39} K$

Answer: B.

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Q 6Assertion (A) & Reason (B) MCQ1 Mark

Assertion (A): Non-metals are electronegative. Reason (R) : Non-metal losë electrons to form cation.

A
Both A & R are right
B
Both A & R are wrong
✓
A is right R is wrong
D
A is the wrong R is right

Answer: C.

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Q 7Assertion (A) & Reason (B) MCQ1 Mark

(A) : Noble gases are chemically inert in nature. Reason (R) : Noble gases have stable electronic structures.

A
Both A & R are right
B
Both A & R are wrong
C
A is right R is wrong
D
A is wrong R is right

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Q 8Assertion (A) & Reason (B) MCQ1 Mark

Assertion (A): Group 2 elements in the modem periodic table are called alkaline earth metals. Reason (R): The oxides of group 2 elements produce alkaline solutions when they are dissolved in water.

A
A is right R is wrong
✓
R explains A
C
R does not explain A
D
R is right A is wrong

Answer: B.

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Q 9[2 Mark Questions]2 Marks

What are nucleons? How many nucleons are present in Phosphorous? Draw its structure.

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Q 10[2 Mark Questions]2 Marks

Calculate the number of neutrons, protons and electrons:

atomic number 3 and mass number 7
atomic number 92 and mass number 238.

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Q 11[2 Mark Questions]2 Marks

Draw the structure of oxygen and sulphur atoms.

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Q 12[2 Mark Questions]2 Marks

Why do ${ }_{17}^{35} CI$ and ${ }_{17}^{37} CI$ and have the same chemical properties? In what respect do these atoms differ?

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Q 13[2 Mark Questions]2 Marks

How was it shown that atom has empty space?

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Q 14Match The Following.4 Marks

Match the following.

a.	Dalton	1.	Hydrogen atom model
b.	Chadwick	2.	Discovery of nucleus
c.	Rutherford	3.	First atomic theory
d.	Neils Bohr	4.	Plum pudding model
		5.	Discovery of neutrons

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Q 15[4 Mark Questions]4 Marks

Complete the following table.

Atomic Number	Mass Number	Number of Neutrons	Number of Protons	Number of Electrons	Name of the Element
9	______	10	______	______	______
16	______	16	______	______	______
______	24	______	______	12	Magnesium
______	2	______	1	______	______
______	1	0	1	1	______

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Q 16[4 Mark Questions]4 Marks

State the Gay Lussac’s law of combining volumes. Explain with an illustration.

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Q 17[4 Mark Questions]4 Marks

What conclusions were made from the observations of Gold foil experiment?

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Q 18[4 Mark Questions]4 Marks

Symbol	Atomic No.	Electronic Configuration
1) He	2	?
2) Ne	?	2,8
3) Ar	?	2, 8,8
4) Na	11	?

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Q 19[4 Mark Questions]4 Marks

To match:

Group in the modern periodic table	Families
a) 1	?
b) ?	Transition metals
c) ?	Boron family
d) 15	?
e) 17	?

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Q 20[7 marks Questions]7 Marks

Explain the postulates of Bohr’s atomic model.

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Q 21[7 marks Questions]7 Marks

List the features of Mendeleev’s Periodic Table.

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Q 22[7 marks Questions]7 Marks

Explain the position of hydrogen in the periodic table.

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Q 23[7 marks Questions]7 Marks

Write the advantages of the Modern Periodic Table.

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Q 24[7 marks Questions]7 Marks

List the advantages of alloys.

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Q 25Fill In The Blanks.1 Mark

The valency of Argon is ______.

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Q 26Fill In The Blanks.1 Mark

The number of neutrons present in 73Li is ______.

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Q 27Fill In The Blanks.1 Mark

______ isotope is used in the nuclear reactors.

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Q 28Fill In The Blanks.1 Mark

Total number of electrons that can be accommodated in an orbit is given by __________.

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Q 29Fill In The Blanks.1 Mark

Calcium and Argon are examples of a pair of ______.

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Q 30[ 1 mark questions ]1 Mark

What is the same about the electron structures of:

Lithium, Sodium and Potassium.
Beryllium, Magnesium and Calcium.

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Q 31[ 1 mark questions ]1 Mark

For an atom ‘X’, K, L and M shells are completely filled. How many electrons will be present in it?

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Q 32[ 1 mark questions ]1 Mark

Name an element which has the same number of electrons in its first and second shell.

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Q 33[ 1 mark questions ]1 Mark

Bromine, carbon, hydrogen, aluminium.

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Q 34[ 1 mark questions ]1 Mark

Copper, brass, gold ornament, bronze.

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Q 35true or false.[1 Mark each]1 Mark

State true or false. If false, correct the statement.

The maximum number of electron in L Shell is 10.

True
False

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Q 36true or false.[1 Mark each]1 Mark

State true or false. If false, correct the statement.

Smaller the size of the orbit, lower is the energy of the orbit.

True
False

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Q 37true or false.[1 Mark each]1 Mark

State true or false. If false, correct the statement.

Electrons have negligible mass and charge.

True
False

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Q 38true or false.[1 Mark each]1 Mark

State true or false. If false, correct the statement.

Isotopes of an element have different atomic numbers.

True
False

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Q 39true or false.[1 Mark each]1 Mark

State true or false. If false, correct the statement.

In an atom, electrons revolve around the nucleus in fixed orbits.

True
False

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