Gp thomson experiment quantum mechanics

The number of atoms per unit cell in simple, fcc and bcc unit cells are

• 1, 4, 2

• 1, 2, 4

• 2, 1, 4

• 2, 4, 1

Metals are good conductors of electricity because

• they contain free electrons
• the atoms are lightly packed 
• they have high melting point
• all of the above

All operators in quantum mechanics have

• eigen functions and eigen values

• only eigen function

• only eigen value

• non of the above

Pa (Pascal) is the unit for

• Thrust
• Pressure
• Frequency
• Conductivity

Stars appears to move from east to west because

• All stars move from east to west
• The earth rotates from west to east
• The earth rotates from east to west
• The background of the stars moves from west to east

For a free particle in a cubical box, the degeneracy of the first excited state is

• two-fold

• three-fold

• six-fold

• nine-fold

What force is responsible for the radioactive decay of the nucleus?

• Gravitational force

• Strong nuclear force

• Weak nuclear force

• Electromagnetic force

The atoms with the same mass number and atomic number, but with different states of excitation in the atomic nucleus is

• Nuclear force

• Nuclear isomerism

• Binding energy

• None of the above

The radioactive decay process wherein an excited nucleus interacts electromagnetically with one of the orbital electrons of the atom is called

• Internal conversion

• Nuclear isomers

• Binding force

• None of the above

Which of the following is the alpha particle?

• $_{+1}e^0$

• $_{-1}e^0$

• $_0n^1$

• $_2He^4$