The atoms of same element having same atomic number but different mass number are called____________________?

Related Mcqs:

1. Halides in which halogen atoms act as a bridge between two atoms of the other element are called___________________?

   A. Covalent halides
   B. Electronegative halides
   C. Polymeric halides
   D. Polymeric hydrides

2. The atomic number of an element having maximum number of unpaired electrons in p-subshell is_______________?

   A. 7
   B. 10
   C. 12
   D. 16

3. When the atoms of third layer are arranged in such a way that they directly lie above the atoms of first layer then this arrangement is called_________________?

   A. ABAB (hexagonal)
   B. ABCABC (Cubic)
   C. Orthor hombic
   D. Rhombohedral

4. Compound containing two halogen atoms on two adjacent carbon atoms are called as ___________?

   A. Glycols
   B. Vicinal dihalides
   C. Geminal dihalides
   D. Diols

   Submitted by: Aamir khan Hullio

5. The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in__________?

   A. 1.8 gram of H₂O
   B. 12 moles of KMnO₄
   C. 0.6N H₂SO₄
   D. 4.6 gram of C₂H₅OH

   Submitted by: Muhammad Ali Kunbhar

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

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

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

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

8. Atomic mass of an atom is present in the __________?

   A. Shell
   B. Orbit
   C. Nucleus
   D. Orbital

   Submitted by: Aamir khan Hullio

9. Atomic orbits having same energy are called________________?

   A. Degenerate orbitals
   B. Bonding molecular orbitals
   C. Anti bonding molecular orbitals
   D. Half filled orbitals

10. Many properties of an element and its compounds can be predicted from the position of the element in the periodic table. What property could not be predicted in this way ?

    A. The nature of its oxides
    B. The charge on its ions
    C. The formula of its oxide
    D. Its number of isotopes