Home
Class 9
CHEMISTRY
Which of the following are true for an e...

Which of the following are true for an element ?
(i) Atomic number = number of protons + number of electrons
(ii) Mass number = number of protons + number of neutrons
(iii) Atomic number = number of protons = number of neutrons
(iv) Atomic number = number of protons = number of electrons

A

I and ii

B

I and iii

C

ii and iii

D

ii and iv

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • STRUCTURE OF ATOM

    DINESH PUBLICATION|Exercise Praticle based question|23 Videos

  • STRUCTURE OF ATOM

    DINESH PUBLICATION|Exercise Short Answer Questions|7 Videos

  • STRUCTURE OF ATOM

    DINESH PUBLICATION|Exercise Higher order thinking skilll based questions|5 Videos

  • MATTER IN OUR SURROUNDINGS

    DINESH PUBLICATION|Exercise (LAQs) Long Answer Questions|5 Videos

Similar Questions

Explore conceptually related problems

The number of protons , electrons and neutrons in tritium are

An atom contains the same number of protons and electrons.

How many electron potons and mass number in a nucleus of atomic number 11 and mass 24 ? (i) number of electron = (ii)number of proton = (iii)number of neutrons =

Are the number of protons and electrons in an atom equal ?

In which of the following elements the ratio of number of protons to the number of neutrons present in the atom is 1:1

If number of electrons in an atom is 8 and number of protons is also 8, then what is the atomic number of the atom

The number of protons in an atom of atomic number Z and mass number A is

In which one of the following , the number of protons is greater than neutrons but number of protons is less than the number of electrons

DINESH PUBLICATION-STRUCTURE OF ATOM -Multiple choice question
  1. Dalton's atomic theory successfully explained. (i) Law of conservat...

    Text Solution

    |

  2. Which of the following statements about Rutherford model of atom are c...

    Text Solution

    |

  3. Which of the following are true for an element ? (i) Atomic number =...

    Text Solution

    |

  4. In the Thomson's model of atom, which of the following statement are c...

    Text Solution

    |

  5. Rutherford's alpha-particle scattering experiment showed that (i) el...

    Text Solution

    |

  6. The ion of an element has 3 positive charges. Mass number of the atom ...

    Text Solution

    |

  7. Identify the Mg^(2+) ion from the figure where, n and p represent the ...

    Text Solution

    |

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

    Text Solution

    |

  9. Elements with valency 1 are

    Text Solution

    |

  10. The first model of an atom was given by

    Text Solution

    |

  11. An atom with 3 protons and 4 neutrons will have a valency of

    Text Solution

    |

  12. The electron distribution in an aluminium atom is

    Text Solution

    |

  13. Which of the following in figure do not represent Bohr's model of an a...

    Text Solution

    |

  14. Which of the following statement is always correct?

    Text Solution

    |

  15. Atomic models have been improved over the years. Arrange the following...

    Text Solution

    |

  16. Atom of an element has one proton one electron and no neutron .Name th...

    Text Solution

    |

  17. Write any two observation which support the fact that atoms are divisi...

    Text Solution

    |

  18. Will ""^(35)Cl and ""^(37)Cl have different valencies? Justify your an...

    Text Solution

    |

  19. Why did Rutherford select a gold foil in his alpha-ray scattering expe...

    Text Solution

    |

  20. Find out the valency of the atoms represented by the Figure (a) and (b...

    Text Solution

    |