Test understanding. select the Correct Answer
 
 
 
 
- Combination of atom of various elements or same element -   molecule
-   electron
-   proton
-   neutron
 
- According to dalton atom is -   liquid
-   soft
-   divisible
-   indivisible
 
- Mass of an atom is concentrated in the -   proton
-   electron
-   neutron
-   nucleus
 
- Chadwick discovered -   proton
-   neutron
-   molecule
-   atom
 
- Rutherford discovered -   proton
-   neutron
-   electron
-   atom
 
- JJ Thomson model was also called -   gold foil
-   plum pudding
-   alpha particle
-   none
 
- Neutron was discovered by -   JJ thomson
-   Rutherford
-   Chadwick
-   none
 
- Atomic number is represented by letter -   A
-   N
-   P
-   Z
 
- Combining property of atom is -   atomic number
-   mass number
-   valency
-   molecule
 
- In isotopes atoms of same element can have different number of  -   proton
-   neutron
-   electron
-   molecule