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.
A polar covalent bond is when atoms with different electronegativities share electrons in a covalent bond.
In polar covalent bonds, the molecules with some polarity will be formed.
for example HCl.
HCl is polar covalent compound as the chloride ion is more electronegative than hydrogen ion.
Covalent character is shown by HCl as the atoms of hydrogen and chlorine share their electrons with each other.
Chloride ion carries partial negative character whereas, hydrogen carries partial positive character.
Also, water molecule is a polar covalent molecule.
It is made up of 2 hydrogen atoms and one oxygen.
The electrons are unequally shared, as oxygen atom spending more time with electrons than the hydrogen atoms due to the electronegativity difference of atoms.
To know more about Polarity:
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Exothermic reactions transfer energy to the surrounding, usually as heat.
Answer:
271
Explanation:
1+10+15+20+25+30+35+40=45+50=
