Structure of Atom

The uncertainty principle was proposed by:

1. Bohr
2. Heisenberg
3. Einstein
4. Rutherford

The discovery of neutron was made by:

1. Rutherford
2. Chadwick
3. Thomson
4. Bohr

The wavelength of electromagnetic radiation is related to frequency by:

1. c = λν
2. c = λ/ν
3. c = ν/λ
4. λ = cν

The principle stating that no two electrons can have the same set of four quantum numbers is:

1. Aufbau principle
2. Hund's rule
3. Pauli exclusion principle
4. Heisenberg principle

The maximum number of electrons in a p-subshell is:

1. 2
2. 4
3. 6
4. 10

The energy of an electron in an atom is mainly determined by:

1. Principal quantum number
2. Spin quantum number
3. Magnetic quantum number
4. Atomic mass

The number of orbitals present in a p-subshell is:

1. 1
2. 2
3. 3
4. 5

According to Bohr's model, electrons revolve around the nucleus in:

1. Random paths
2. Fixed energy orbits
3. Circular waves
4. Elliptical clouds

The quantum number that determines the shape of an orbital is:

1. Principal quantum number
2. Azimuthal quantum number
3. Magnetic quantum number
4. Spin quantum number

The shape of an s-orbital is:

1. Dumbbell
2. Spherical
3. Circular
4. Linear

The nucleus of an atom contains:

1. Electrons only
2. Protons and neutrons
3. Neutrons only
4. Protons and electrons

The maximum number of electrons in a shell is given by:

1. n²
2. 2n²
3. 2n
4. n³

The atomic number of an element represents the number of:

1. Neutrons
2. Electrons and neutrons
3. Protons
4. Nucleons

The scientist who discovered the electron was:

1. Rutherford
2. J.J. Thomson
3. Bohr
4. Chadwick

The charge on an electron is:

1. +1.6 × 10⁻¹⁹ C
2. −1.6 × 10⁻¹⁹ C
3. 0 C
4. +1 C