Explanation

A peptide is a molecule composed of two or more amino acids linked together through amide bonds.

It is a polyamide, meaning it is a polymer of amino acids.

Peptides are smaller than proteins, which are long chains of amino acids.

Explanation

Silver nitrate (AgNO3) is a strong oxidizing agent and a caustic substance.

It is also known as "lunar caustic" due to its historical use to treat lunar burns (sunburn).

Explanation

• The 4th and 5th periods in the periodic table are known as the long periods.
• These periods contain 18 elements each, making them the longest periods in the periodic table.

Important Points:

• Short periods: 1st and 2nd periods (2 and 8 elements, respectively)
• Long periods: 4th and 5th periods (18 elements each)
• Normal periods: 3rd and 6th periods (8 and 12 elements, respectively)

Explanation

• Gamma rays are commonly used for sterilization of medical instruments.
• Because of their high energy and penetrating power, which allows them to effectively kill bacteria and other microorganisms.
• Gamma radiation is also used to sterilize medical supplies.
• Such as syringes, gloves, and implantable devices.

Explanation

The atomic mass of sodium (Na) is approximately 23 atomic mass units (amu).

It is based on the sum of protons and neutrons in its most common isotope.

Explanation

 As a reaction proceeds, the rate of reaction decreases because the concentration of reactants decreases, leading to fewer collisions and slower reaction. 

Explanation

Ice (solid water) is formed from molecules held together by hydrogen bonds, making it a molecular solid.

Explanation

Explanation

  Cohesion refers to the attraction between water molecules due to their polar nature, allowing them to "stick" together. 

Explanation

In ammonium ion, electrons required between hydrogen ion and nitrogen ion are two.