9th Standard Syllabus & Materials
9th Standard
TN 9th Tamil உள்ளத்தின் சீர் -கற்கண்டு (இலக்கணம்) - தொடர் இலக்கணம், ஆகுபெயர் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் -விரிவானம் (துணைப்பாடம்) - தாய்மைக்கு வறட்சி இல்லை! Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் -கவிதை பேழை (செய்யுள்) - மார்கழி பெருவிழா Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உயிருக்கு வேர்-இலக்கணம் - பகுபத உறுப்பிலக்கணம் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil அமுதென்று பேர் - இலக்கணம்-எழுத்து -அளபெடை Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil அமுதென்று பேர்-துணைப்பாடம் - ஆறாம்திணை Important Questions And Answers Study Material - QB365 Set A
Published on: 27/08/2019
Atomic Structure
Download Tamil Nadu 9th Standard Science question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Science Test1.
2H2 + O2 \(\longrightarrow \)2H2O. This is a___________ reaction.
Combination
Displacement
Decompostion
Exothermic
2.
Law of multiple proportions was proposed by _________
J. Ritcher
Rutherford
John Dalton
J.J Thomson
3.
The correct electronic configuration of potassium is
2,8,9
2,8,1
2,8,8,1
2,8,8,3
4.
The term nucleons refer to
Protons and electrons
only Neutrons
electrons and neutrons
Protons and neutrons
5.
Among the following the odd pair is
8O18,9F19
18Ar40,7N14
14Si30, 15P31
24Cr54, 19K39
6.
Orbit is the path by which electrons revolve around the nucleus.
7.
Beta particle is negatively charged and is identical with electron.
8.
Electrons have negligible mass and charge.
9.
Isotopes of an element have different atomic numbers
10.
In an atom, electrons revolve around the nucleus in fixed orbits
11.
Bohr model was applicable only to _________
12.
Positive charges are concentrated in the central region of the atom called __________.
13.
The valency of Argon is ________
14.
The number of neutrons present in \(_{ 3 }^{ 7 }{ Li }\) is ------
15.
_________ isotope is used in the nuclear reactors.
16.
Isobars
17.
Rutherford
18.
Isotopes
19.
Thomson
20.
Dalton
1.
(a)
Combination
2.
(c)
John Dalton
3.
(c)
2,8,8,1
4.
(d)
Protons and neutrons
5.
(d)
24Cr54, 19K39
6.
(a)
7.
(a)
8.
(a)
9.
(b)
10.
(a)
11.
( )
Hydrogen
12.
( )
Nucleus
13.
( )
zero
14.
( )
4
15.
( )
Uranium-235
16.
same mass number
17.
\(\alpha \)-ray scattering experiment;
18.
Same atomic number but different mass number;
19.
Plum pudding model
20.
First atomic theory
9th Standard Syllabus & Materials
9th Standard
TN 9th Tamil உள்ளத்தின் சீர் - திருக்குறள் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் - மணிமேகலை Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் - ஏறு தழுவுதல் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உயிருக்கு வேர் - தண்ணீர் Important Questions And Answers Study Material - QB365 Set A
Tamilnadu Stateboard 9th Standard Subjects
Tamilnadu Stateboard Standards
