Both of them are a hope this helps
Answer:
Molecular oxygen and Hydrogen fluoride.
Explanation:
Definition:
Hydrogen bonding:
It is a type of dipole-dipole attraction between the hydrogen atom and more electronegative atoms.
In hydrogen bonding mostly the highly electronegative atoms are fluorine, nitrogen and oxygen.
Explanation:
In given compound such as methane CH₄ the electronegativity of carbon is 2.55 while that of hydrogen is 2.2 so there is smaller electronegativity difference that's why it can not form hydrogen bond.
In case of molecular oxygen the electronegativite atom oxygen is present. It can form hydrogen bonds with water. its electronegativity is 3.44.
In case of hydrogen fluoride the electronegativity atom fluorine is present. It will form hydrogen bonds with water. Its electronegativity is 3.98. So it is more likely to take part in hydrogen bonding.
Some of the properties are:
1. Gamma, γ-rays are not deflected by electric and magnetic fields. It shows that they do not have any charge.
2. Gamma, γ-rays are electromagnetic waves like X-rays. The wavelength of γ-ray photon is smaller than that of X-rays.
3. The rest mass of a Gamma, γ-ray photon is zero. (Photon has mass zero but it has momentum, why?)
4. Gamma, γ-rays travel with the speed of light.
5. Gamma, γ-rays have very large penetrating power. They can pass through several centimeter of iron and lead.
6. Gamma, γ-rays can produce fluorescene in a substance like willimite.