Kindly answer the questions in the box mentioned below:

1      The smallest particles of the substance is called as....

A   atom 

B   matter

C   molecules

D   tiny particles

2      The central part of the atom is called as....

A proton 

B neutron 

C nucleus

D electrons

3  The nucleus of an atom contains the particles of.....

A  neutrons only

B   protons & neutrons 

C electrons & protons 

D neutrons & electrons

4  How many times proton is heavier than the electron? A 1240

B  1460

C  1720

D  1840

5   Which part of an atom is having negative electric charge?

A  Proton B Nucleus C Neutron D Electron

6   If the number of protons in an atom is 29, then the number of electrons are.......

A   18

B   25

C   29

D  32

7  Which shell is the nearest to the nucleus? A L

B  M

C  K

D  N

8  An aluminum atom has......

A 2 shells

B 3 shells

C  4 shells

D  5 shells

9   How many protons are in Aluminum atom? A 13

B  15

C  18

D  29

10  The particles revolving on the outermost orbit in an atom is called as.........

A   protons 

B neutrons 

C electrons

D valence electrons