Atoms MCQs with Answers

The energy required by an electron to move from ground state to higher energy state is called _?

• A.Excitation energy
• B.Ionization energy
• C.Binding energy
• D.Kinetic energy

Rutherford used thin gold foil in his experiment because ?

• A.Gold is highly reactive and interacts well with alpha particles
• B.Gold is the cheapest metal available for such experiments
• C.Gold has a high atomic number that repels electrons
• D.Gold is easily hammered to a very thin film

Which process converts an atom from one element to another, when the nucleus of an atom is bombarded with high energy particles?

• A.Nuclear fission
• B.Artificial transmutation
• C.Radioactive decay
• D.Nuclear fusion

Shape of the orbital is given by ?

• A.Principal quantum number
• B.Spin quantum number
• C.Magnetic quantum number
• D.Azimuthal quantum number

Which of the following sub-shell does not exist?

• A.1s
• B.2p
• C.1p
• D.3d

An atom is the smallest particle of matter that takes part in a chemical reaction. What happens when two atoms approach one another?

• A.Attractive and repulsive forces increase
• B.Only attractive forces increase
• C.Only repulsive forces increase
• D.No forces act between them

Which one of the following principal quantum numbers has the largest s orbital?

• A.n=1
• B.n=2
• C.n=3
• D.n=4

The atomic masses of elements depend upon _?

• A.Number of protons only
• B.Number of neutrons only
• C.Number of isotopes & their abundance
• D.Number of electrons only

The maximum mass of an atom is concentrated in _?

• A.Neutrons only
• B.Electrons
• C.Orbits
• D.Nucleus

The most stable nuclei are obtained from the combinations _?

• A.Even N and even Z
• B.Odd N and odd Z
• C.Even N and odd Z
• D.Odd N and even Z