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Science TNSB Mentoring
Class 10 Crash course
Atoms and molecules
Introduction to atoms and molecules
2.
Atoms and molecules
Question:
3
m.
Identify the correct answer:
1
.
Electrons + neutrons
Protons + neutrons
Electrons + protons
Protons + electrons
contribute for the mass number of an atom.
2.
The natural abundance of the isotope of \(C-13\) is
\(2.10\)%
\(97.90\)%
\(1.10\)%
\(98.90\)%
.
3.
\(E=mc\)
\(E=\frac{m}{c}\)
\(E= c\)
\(E=mc^2\)
is the formula for converting the mass of an atom into energy.
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