Elements which emit natural radioactivity are known as __________ ?

Related Mcqs:

1. The earth absorb radiation in Visible range but emit radiation at the same rate in the:

   A. Ultra voilet B. Gamma rays C. Infrared D. All of these Submitted by: Said wali shah...

2. What is the name of that system, which uses radioactivity to decide the period of materials of-pre-historic period ?

   A. Radium dating B. Uranium dating C. Carbon dating D. Deuterium dating Submitted by: Abid Hussain...

3. 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)...

4. d-block elements are also called as __________?

   A. Inner Transition B. Outer Transition C. Alkali Metals D. Both B & C Submitted by: Aamir khan Hullio...

5. 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...

6. All the transition elements show_________________?

   A. Similar physical properties B. Similar chemical properties C. Both A and b D. None...

7. Inner transition elements are called _________________?

   A. Lanthanides B. Actinides C. Rare earth metals D. All...

8. In which of the following pairs are elements belonging to the same group ?

   A. Boron & Beryllium B. Nitrogen & Phosphorous C. Magnesium & Aluminium D. Gallium & Helium...

9. Boron is non metal while other elements of IIIA group are metals. This is because______________?

   A. it has small size B. it has high nuclear charge C. it forms molecular addition compounds D. all of the above...

10. Atoms of all the elements always contain in nucleus:

    A. Proton and neutron B. Neutron and electron C. Proton D. Neutron Submitted by: Shumail Bashir...