Answer:
Take for example I₂ (iodine)
Explanation:
It has only a pair of electrons between the iodine atoms in order to gain a stable arrangement of 8 electrons in its outer shell. It is sharing them, so it's a covalent bond as a single iodine atom cannot be stable on its own. It's a halogen and is a single covalently-bonded diatomic molecule.
Similarly, take oxygen. IT needs two pairs of electrons just so it can reach a stable outer shell of 8 electrons. If it doesn't then it cannot be stabilised so it must be bonded with another oxygen atom and share two electrons.
<u>Answer:</u>
The correct answer option is a) collisions between the particles and surrounding molecules.
<u>Explanation:</u>
The collisions between the particles and surrounding molecules causes the Brownian motion of particles in a colloid.
Brownian motion is the irregular movement of the microscopic particles in a fluid which bombard into each other.
It basically is the result of the molecules of a dispersion medium colliding with the dispersed particles of the phase.
- <u>A substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change is called a catalyst.</u>
<em>Hope</em><em> </em><em>it</em><em> </em><em>helps</em><em> </em><em>~</em>
Pure substances cannot be separated into any other kinds of matter while a mixture is a combination of two or more pure substances
A pure substance has constant physical and chemical properties while mixtures have varying physical and chemical properties
The atoms are different by prime difference lies in the fact that pure substances cannot by physically separated while mixtures can be (physical methods)