English

If 12 Gram of Carbon Has X Atoms, Then the Number of Atoms in 12 Grams of Magnesium Will Be :

Advertisements
Advertisements

Question

If 12 gram of carbon has x atoms, then the number of atoms in 12 grams of magnesium will be :

Options

  • x

  • 2x

  • `x/2`

  • 1.5 x

MCQ
Advertisements

Solution

The number of atoms in 12g of magnesium will be x/2.

shaalaa.com
  Is there an error in this question or solution?
Chapter 3: Atoms and Molecules - Very Short Answers [Page 173]

APPEARS IN

Lakhmir Singh Chemistry Part 2 [English] Class 9
Chapter 3 Atoms and Molecules
Very Short Answers | Q 41 | Page 173

RELATED QUESTIONS

An element has an atomic number of 11 and its mass number is 23. What is the arrangement of electrons in the shells? State nuclear composition of an atom of the element.


If the number of electrons in an ion Z3– is 10, the atomic number of element Z will be :


What name is given to this number ?


What weight of oxygen gas will contain the same number of molecules as 56 g of nitrogen gas ?

(O = 16 u ; N = 14 u)


What mass of nitrogen, N2, will contain the same number of molecules as 1.8 g of water, H2O ?

(Atomic masses : N = 14 u ; H = 1 u ; O = 16 u)


How many grams of magnesium will have the same number of atoms as 6 grams of carbon ?
(Mg = 24 u ; C = 12 u )


Classify each of the following on the basis of their atomicity.

  1. F2
  2. NO2
  3. N2O
  4. C2H6
  5. P4
  6. H2O2
  7. P4O10
  8. O3
  9. HCl
  10. CH4
  11. He
  12. Ag

Which has more number of atoms?

100g of N2 or 100 g of NH3


A gold sample contains 90% of gold and the rest copper. How many atoms of gold are present in one gram of this sample of gold?


A silver ornament of mass ‘m’ gram is polished with gold equivalent to 1% of the mass of silver. Compute the ratio of the number of atoms of gold and silver in the ornament.


. A sample of ethane (C2H6) gas has the same mass as 1.5 ×1020 molecules of methane (CH4). How many C2H6 molecules does the sample of gas contain?


In the atom of an element X, 6 electrons are present in the outermost shell. If it acquires noble gas configuration by accepting requisite number of electrons, then what would be the charge on the ion so formed?


Match the names of the Scientists given in column A with their contributions towards the understanding of the atomic structure as given in column B

  (A)   (B)
(a) Ernest Rutherford (i) Indivisibility of atoms
(b) J.J.Thomson (ii) Stationary orbits
(c) Dalton (iii) Concept of nucleus
(d) Neils Bohr (iv) Discovery of electrons
(e) James Chadwick (v) Atomic number
(f) E. Goldstein (vi) Neutron
(g) Mosley (vii) Canal rays

The atomic number of calcium and argon are 20 and 18 respectively, but the mass number of both these elements is 40. What is the name given to such a pair of elements?


Helium atom has 2 electrons in its valence shell but its valency is not 2, Explain


An element X has a mass number 4 and atomic number 2. Write the valency of this element?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×