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The mass number of an atom is determined...

The mass number of an atom is determined by

A

adding the number of neutrons and number of electrons

B

adding the number of protons and number of electrons

C

the number of protons only

D

adding the number of neutrons and number of protons

Text Solution

Verified by Experts

The correct Answer is:
D
The atomic mass is determined by adding the number of protons and neutrons in the atom.
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NDA PREVIOUS YEARS-BASIC CONCEPTS OF CHEMISTRY, ATOMIC STRUCTURE-Chemistry
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  2. The pressure of an ideal gas undergoin isothermal change is increased ...

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  3. The mass number of an atom is determined by

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  4. Consider the following reaction : xAs(2)S(3)+yO(2)to zAs(2)O(3)+wSO(...

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  5. How many grams of MgCO(3) contain 24.00 g of oxygen ? (The molar mas...

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  6. A monatomic species that has 18 electrons and a net charge of 2^(-) ha...

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  7. A sample of carbon dioxide that undergoes a transformation from solid ...

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  8. A compound X(2)O(3) contains 31.58% oxygen by weight . The atomic mass...

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  9. Which one among the following contains the most neutrons ?

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  10. If the reaction of 1.0 mol NH(3)(g) and 1.0 mol O(2)(g)4NH(3)(g)+5O(2)...

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  11. Consider the following reaction : CH(4)(g)+H(2)O(g) overset(1270 K) ...

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  12. Ammonia (NH(3)) obtained from different sources always has same propor...

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  13. Which of the following statements regarding heavy water are correct ? ...

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  14. To weld metals together, high temperature is required. Such a high tem...

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  15. Match List I with List II and select the correct answer using the code...

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  16. The symbol of the element 'Tungsten' is :

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  17. Which one of the following statements is correct ?

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  18. Which one of the following is not a chemical change ?

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  19. An atom of carbon has 6 protons. Its mass number is 12. How many neutr...

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  20. What is the number of mole(s) of H(2)(g) required to saturate one mole...

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