STRUCTURE OF AN ATOM

What is the symbol for Mass Number , Atomic Number and element ?

• Mass No. = Z

  Atomic No. = X Element = A

• Mass No. = X

  Atomic No. = Z

  Element = A

• Mass No. = A

  Atomic No. = Z

  Element = X

• Mass No. = A

  Atomic No. = X

  Element = Z

Formula for finding the No. of Neutrons =

• Mass Number - Atomic Number

• Mass Number + Atomic Number

• Atomic Number - Mass Number

• Mass Number - No. of Protons

What is the formula for finding the number of electrons present in the shell ?

• 2n

• None of the above

What is the electronic configuration of Sodium ?

• 2,8,8

• 2,8,6

• 2,8,1

• 2,3

What is the electronic configuration and name of this atom in the image ?

• Electronic Configuration = 2,4

  Name = Carbon

• Electronic Configuration = 2,8,8,1

  Name = Potassium Atom

• Electronic Configuration = 2,8,1

  Name = Sodium Atom

• Electronic Configuration = 2,8,8,2

  Name = Calcium Atom

Which among the following is present inside the nucleus of an atom ?

• Protons

• Electrons

• Neutrons

• All of the above

Who performed the famous 'gold foil experiment' ?

• Dalton

• Thomson

• Rutherford

• Bohr

The presence of anode rays inside the discharge tube was shown by ?

• J.J. Thomson

• Goldstein

• Chadwick

• Newton

J.J. Thomson proposed an atom model popularly known as

• CAKE MODEL

• PLUM PUDDING MODEL

• SANDWICH MODEL

• BREAD AND BUTTER MODEL

An atom having atomic mass number 13 has 7 neutrons. What is the atomic number of the atom?

• 13

• 7

• 6

• 12