TEST SERIES - 69 (II)

In an atom the order of filling up of the orbitals is governed by

• Aufbau principle

• Heisenberg’s uncertainty principle

• Hund’s rule

• Pauli’s exclusion principle

Regarding the atom of a chemical element, the magnetic quantum number refers to

• orientation

• shape

• size

• spin

Bohr model can explain about

• Spectrum of hydrogen atoms

• Spectrum of one atom/ion having one electron only

• Spectrum of hydrogen molecule

• None of the above

The atoms of the elements having same mass number but different atomic number are called

• isotopes

• isobars

• isotones

• isomers

Any p-orbital can accommodate upto

• 4-electrons

• 6-electrons

• 2-electrons in opposite

• None of the above

Which one is not the isotopes of hydrogen?

• Protium

• Eritium

• Deuterium

• Tritium

Radioactive isotope of hydrogen is

• Protium

• Deutrium

• Tritium

• All of these

Mass of electron is

• 1.66 × 10-24 g

• 6.023 × 10-23 g

• 9.1 × 10-28 g

• 9.1 × 10-25 g

Rutherford’s scattering experiment related to the size of the

• nucleus

• atom

• electron

• neutron

Isotopes of the same elements have

• same number of neutrons

• same number of protons

• same atomic mass

• different chemical properties