10th Standard Syllabus & Materials
10th Standard
TN 10th English Prose - 4 - The Attic Important Questions And Answers Study Material - QB365 Set A
NEW10th Standard
TN 10th English Supplementary - 3 - The Story of Mulan Important Questions And Answers Study Material - QB365 Set A
NEW10th Standard
TN 10th English Poem - 3 - I am Every Woman Important Questions And Answers Study Material - QB365 Set A
NEW10th Standard
TN 10th English Prose - 3 - Empowered Women Navigating The World Important Questions And Answers Study Material - QB365 Set A
NEW10th Standard
TN 10th English Supplementary - 2 - Zigzag Important Questions And Answers Study Material - QB365 Set A
NEW10th Standard
TN 10th English Poem - 2 - The Grumble Family Important Questions And Answers Study Material - QB365 Set A
Published on: 13/05/2022
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Questions + Answers key
Take MCQ Science Test1.
What is a molecule?
2.
Relative atomic mass has no unit. Explain.
3.
Define average atomic mass (AAM).
4.
Measurement of atomic mass of an element is very difficult? Give reason.
5.
Define atomic mass unit?
1.
A molecule is a combination of two or more atoms held together by strong chemical forces of attraction i.e. chemical bonds.
2.
Relative atomic mass is the ratio between the of average mass of its isotopes to \(\frac{1}{12^{th}}\) part of mass of Carbon - 12 atom.
Relative Atomic Mass (Ar)
= \(\frac{Average \ mass \ of \ isotopes \ of \ the \ element}{{\frac{1}{{12}^{th}}mass \ of \ one \ Carbon - 12 atom}}\)
Since RAM is a ratio, it has no unit.
3.
The average atomic mass of an element is the weighted average of masses of its naturally occurring isotopes.
4.
(i) Measurement of atomic mass of an element is somewhat more complicated since most of the elements exist as a mixture of isotopes, each of which has its own mass.
(ii) Thus, it is essential to consider this isotopic mixture while calculating atomic mass of an element.
5.
Atomic mass unit is one - twelfth of mass of carbon - 12 atom, an isotope of carbon which contains 6 protons and 6 neutrons.
10th Standard Syllabus & Materials
10th Standard
TN 10th English Prose - 2 - The Night the Ghost Got in Important Questions And Answers Study Material - QB365 Set A
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TN 10th English Supplementary - 1 - The Tempest Important Questions And Answers Study Material - QB365 Set A
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TN 10th English Poem - 1 - Life Important Questions And Answers Study Material - QB365 Set A
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TN 10th English Prose - 1 - His First Flight Important Questions And Answers Study Material - QB365 Set A
Tamilnadu Stateboard 10th Standard Subjects
Tamilnadu Stateboard Standards
