Mostly elements have fractional atomic masses because of______________________?

Related Mcqs:

1. The atomic radii decreases by increasing atomic number in________________?

   A. Alkali metal
   B. Alkaline earth metal
   C. Elements from Li to Ne
   D. Halogens

2. The number of isotopes of elements with even mass number and even atomic number are ________________?

   A. 280
   B. 300
   C. 154
   D. 54

3. Actinides are the elements with atomic number from:

   A. 97 to 104
   B. 101 to 115
   C. 89 to 103
   D. 36 to 43

   Submitted by: Fahad Mehsud

4. Actinides are the elements with atomic numbers from __________?

   A. 97 to 104
   B. 101 to 115
   C. 89 to 103
   D. 36 to 43

   Submitted by: Fahad Mehsud

5. Mostly ionic compound are produced in between elements of_________________?

   A. IA and VIA
   B. IA IIA and VIIA
   C. IB and VIIB
   D. IA and IB

6. Which of the p-block elements are not representative elements ?

   A. Alkali metals (I-A)
   B. Group-14 elements (IV-A)
   C. Group-18 elements (VIII-A)
   D. Halogens (VII-A)

7. In alkaline battery the anode is made up of______________________?

   A. MnO2
   B. Zn
   C. AgO2
   D. cadmium

8. Equal masses of methane and oxygen are mixed in empty container at 250?(C) The fraction of total pressure exerted by oxygen is___________________?

   A. one / seventeen
   B. sixteen / seventeen
   C. one / three
   D. two / three

9. The amount of Benzene is obtained from Coal Tar on its Fractional Distillation?

   A. 1-2Kg
   B. 1-3Kg
   C. 1-4Kg
   D. 1-5Kg

   Submitted by: Aamir khan Hullio

10. How many isotopes have odd atomic number ?

    A. 154
    B. 280
    C. 86
    D. 300