Chemistry : Structure of Atom

The relationship between the energy E₁ of the radiation with a wavelength 8000 Å and the energy E₂ of the radiation with a wavelength Å 16000  is:

• E₁ = 6E₂

• E₁ = 2E₂

• E₁ = 4E₂

• E₁ = 4E₂

Calculate the mass loss in the following.

${}_1{}^2\mathrm{H} + {}_1{}^3\mathrm{H} \to {}_2{}^4\mathrm{H} + {}_0{}^1\mathrm{n}$

[Given the masses : ²H = 2.014;³H = 3.016; He = 4.004; n = 1.008 amu]  

• 0.018 amu

• 0.18 amu

• 0.0018 amu

• 1.8 amu

The observation that the ground state of nitrogen atom has 3 unpaired electrons in its electronic configuration and not otherwise is associated with:

• Pauli's exclusion principle

• Hund's rule of maximum multiplicity

• Heisenberg's uncertainty relation

• Ritz combination principle

The first artificial disintegration of an atomic nucleus was achieved by

• Geiger

• Wilson

• Madam Curie

• Rutherford

When any radioactive element emits β particle, some product is obtained. They both are

• isotopes

• isobars

• isomers

• isotoes

Electrical field is used to deflect

• α and β particles

• α and γ particles

• α,  β and γ particles

• β and γ particles

Meson was discovered by

• Yukawa

• Austin

• Moseley

• Einstein

The following element forms a molecule with eight of its own atoms

• Si

• S

• Cl

• P

The energy of an electron present in Bohr's second orbit of hydrogen atom is

• -1312 J atom^-1

• -328 kJ mol^-1

• -328 J mol^-1

• -164 kJ mol^-1

In the ground state, an element has 13 electrons in M shell. The element is

• copper

• chromium

• nickel

• iron