A. Alpha emission
B. Beta emission
C. Both A & B
D. Radioactivity
Related Mcqs:
- In a group, atomic radii increase due to successive increase of _________ ?
A. Electronic shells
B. Proton shells
C. Neutron shells
D. NucleusSubmitted by: Rashid Mehmood
- The atomic radii decreases by increasing atomic number in________________?
A. Alkali metal
B. Alkaline earth metal
C. Elements from Li to Ne
D. Halogens - Boiling points of hydrocarbons increase with the increase in number of carbon atoms. It is mainly due to_________________?
A. More strength of H-bonding
B. More strength of London forces
C. Less polarizability
D. All of the above - Atomic orbits having same energy are called________________?
A. Degenerate orbitals
B. Bonding molecular orbitals
C. Anti bonding molecular orbitals
D. Half filled orbitals - Atom with higher atomic number produces X-rays of__________________?
A. Shorter wavelength
B. Larger wavelength
C. X-ray not produced
D. All are possible - The atomic number of an element having maximum number of unpaired electrons in p-subshell is_______________?
A. 7
B. 10
C. 12
D. 16 - Mostly elements have fractional atomic masses because of______________________?
A. Mass of an atom itself is in fraction
B. Atomic masses are average masses of isobars
C. Atmoic masses are average masses of isotopes proportional to their relative abundance
D. Atmoic masses are average masses of isotopes - Atomic number of Mn is 25 what is the electronic configuration in the ground state________________?
A. 1s2 2s2 2p6 3s2 3p6 3d7
B. 1s2 2s2 2p6 3s2 3p6 4s2 4p5
C. 1s2 2s2 2p6 3s2 3p5 3d10
D. 1s2 2s2 2p6 3s2 3p6 4s23d5 - Atomic radius can be determined by_________________?
A. X – ray diffraction
B. Spectrophotometer
C. Optical microscope
D. Electron microscope - Atomic mass of an atom is present in the __________?
A. Shell
B. Orbit
C. Nucleus
D. OrbitalSubmitted by: Aamir khan Hullio
