Explanation

• Synthetic resins are used in places where adhesion is required.
• They provide strong bonding properties, making them ideal for coatings, glues, and composite materials.

Explanation

• An alloy of Cu - Sn is called Bell metal.
• Bell metal is a specific type of bronze with a higher tin content, commonly used for making bells.

Explanation

Ba is the chemical symbol for Barium, a chemical element with atomic number 56.

It is a soft, silvery-white alkaline earth metal.

Explanation

• In a NaCl crystal lattice, each sodium (Na+) ion is surrounded by six chlorine (Cl-) ions, forming an octahedral geometry.
• This means that each Na+ ion is coordinated by six Cl- ions, and vice versa.

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

• In Rutherford's famous experiment, known as the "Gold Foil Experiment" or "Rutherford's Scattering Experiment", a thin layer of zinc sulphide (ZnS) was used as the screen to detect the scattered alpha particles.
• Zinc sulphide is a phosphor that emits light when struck by radiation, allowing Rutherford to visualize the trajectory of the alpha particles.

Explanation

• Electronic configuration refers to the distribution of electrons within an atom or molecule.
• It shows how the electrons are arranged in different energy levels (shells) and sublevels (orbitals) around the nucleus.

Explanation

Group VIII-A, also known as the noble gases, consists of:

• Helium (He)
• Neon (Ne)
• Argon (Ar)
• Krypton (Kr)
• Xenon (Xe)
• Radon (Rn)

Explanation

• When two identical atoms share electron pairs and exert an equal force on each other, the bond formed is a non-polar covalent bond.
• This type of bond is characterized by a equal sharing of electrons, resulting in a balanced and symmetrical distribution of electrons.

Explanation

• The octet rule states that atoms tend to gain, lose, or share electrons to achieve a full outer energy level, which typically corresponds to eight electrons in the valence shell.
• This rule is a fundamental principle in chemistry and is used to explain the formation of chemical bonds and the structure of molecules.