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Which of the following statement is corr...

Which of the following statement is correct about the atom of an element ?

A

an atom can have only protons and neutrons but no electrons

B

an atom can have only electrons and neutrons but no protons

C

an atom can have only electron and proton but no neutron

D

an atom must always have a proton, neutron and electron

Text Solution

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The correct Answer is:
C
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LAKHMIR SINGH & MANJIT KAUR-STRUCTURE OF ATOM-Exercise
  1. (a) Define valency of an element. What valency will be shown by an ele...

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  2. The mass number of two atoms X and Y is the same (40 each) but their a...

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  3. Which of the following statement is correct about the atom of an eleme...

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  4. There are two species represented as ""^(35)Cl and ""^(37)Cl. Which of...

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  5. The radioactive isotope used in the treatment of cancer is :

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  6. Elements with valency 1 are

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  7. In a sample of ethyl ethanote (CH(3)COOC(2)H(5)) the two oxygen atoms ...

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  8. Which of the following elements does not exhibit electrovalency ?

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  9. The number of valence electrons in a graphite atom is :

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  10. The atomic numbers of four elements A,B,C and D are 12,13,15 and 3 res...

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  11. The number of valence electrons in a sulphide ion, S^(2-) is :

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  12. For an element, Z = 9. The valency of this element will be :

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  13. Four elements W,X,Y and Z contain 8,11,9 and 17 protons per atom respe...

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  14. The four atomic species can be represented as follows. Out of these, t...

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  15. There are four elements P,Q,R and S having atomic numbers of 4,18,10 a...

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  16. The atomic number of an element X is 8 and that of element Y is 4. Bot...

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  17. The isotopes of an element contain :

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  18. Which is the number of valence electrons in : (a) sodium ion, Na^(+)...

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  19. Atom A has a mass number 209 and atomic number 82 Atomic B has a mas...

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  20. Which of the following pairs are isotopes ? Give reasons for your choi...

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