Law of multiple proportion was put forward by

The number of neutrons in an atom of Hydrogen is

The atomic number of carbon is 6 and its atomic mass is 12. How many are there protons in the nucleus of carbon?

What is the value of charge of an Electron?

What is the number of valence electrons of Aluminium?

What is the mass number of an element, the atom of which contains two protons, two neutrons and two electrons?

Who discovered the exact charge of electron?

Plum Pudding Model of the Atom was proposed by:

The maximum number of electrons in N shell is :

The outermost shell electronic configuration of an element  4s2 4p3 .To which period of the periodic table does this element belong to?

The person behind the invention of positron

What would be the atomic number of the element in whose atom the K and L shells are full?

The atomic nucleus was discovered by:

Maximum number of Electrons that can be accommodated in P orbital

Nucleus of an atom contains:

How many valence electrons does an oxygen atom have

The maximum number of electrons in a shell?

The name electron was proposed by

Lightest sub atomic particle is

Name the scientist who suggested the theory of dual nature of matter?

The theory that the electrons revolve around the nucleus in circular paths called orbits was propounded by ______

The elements having same atomic number but different mass numbers are called ______

The correct electronic configuration of sodium is:

What will be the number of neutrons in an atom having atomic number 35 and mass number 80?

Which of the following was discovered in Milikan's oil drop experiment?

Atoms which have same mass number but different atomic number are called

The atomic theory of matter was first proposed by

Which isotope of hydrogen contains only one proton and no neutron in its nucleus?

Which metal was used by Rutherford in his alpha-scattering experiment?

An atom has a mass number of 37 and atomic number 17. How many protons does it have?

Who is credited with the discovery of electron?

How many electrons does the outermost shell of Neon have

Atomic mass of an element is equal to the sum of

The heaviest particle among all the four given particles is

Isotones have same

No two electrons in an atom can have the same values of all four quantum numbers according to

Mass of positron is the same to that of

Neutron was discovered by

Which of the following has a positive charge?

Reduction is the addition of

Ore of Aluminium :

High percentage of carbon is found in:

_______ is the hardest known natural substance.

The number of carbon atoms surrounding each carbon in diamond is :

Which of the following is not an allotrope of carbon?

Which of the following elements is commonly present in petroleum, fabrics and proteins?

What is the valency of carbon?

The basic element present in all organic compounds is

The element which is known as the enemy of copper is

Which element is known as king of poison?