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Unit 2

This document is a test paper for 9th-grade chemistry students at Allied School Haripur Campus, covering Chapter 2. It includes multiple-choice questions, short answer questions, and a long question related to atomic structure and properties of elements. The total marks for the test are 30, with specific sections allocated for different types of questions.

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40 views2 pages

Unit 2

This document is a test paper for 9th-grade chemistry students at Allied School Haripur Campus, covering Chapter 2. It includes multiple-choice questions, short answer questions, and a long question related to atomic structure and properties of elements. The total marks for the test are 30, with specific sections allocated for different types of questions.

Uploaded by

White Rose
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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ALLIED SCHOOL HARIPUR CAMPUS

Name ______________ Test 2(CH 2) Time: 1hr


Class: 9th Subject: Chemistry Total Marks:30
A. Choose the correct option. /7
1.Which one of the following consist of three sub-shells?
a.L b.M c.N d.O
2.The concept of orbit was used by……
a.J.J Thomson b.Bhor c.Rutherford d.Dalton
3……… used for the identification of blood circulation problems in patients.
a.Na 23 b.Na 24 c.C 12 d.C 14
4.1s2,2s2,2p6 is the electronic configuration of?
a.Na b. Ne c. N d. P
5. n=2 has two sub shells which are given by………..
a.2s b.2s,2p c.1s,2s d.3s,3p,3d
6. Isotopes are the atoms of the same element with similar atomic no. but different…….
a.mass number b.atomic volume c.atomic structure
d.atomic radii
7. Neutron is ……… times heavier than electron
a.1832 b.1823 c.1842 d.1824
B. Attempt all short questions /16
i. Write down the electronic configuration of F, P, Si and Ar.
ii. a.Isotopes have same chemical properties but different physical properties.Give reason.
b.Draw the isotopes of carbon.
iii. Distinguish between shell and sub-shell.
iv. Write down the defects of Rutherford atomic model.
C. Long question. /7
1.a. Find the number of electrons of 2nd and 3rd shell using Bohr’s formula.
b. Compare the properties of fundamental particles of an atom.

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