Explanation

• Copper (تانبا) is a good conductor of electricity.
• It allows electric current to flow easily.

Additional information:

• Metals are generally good conductors.
• Non-metals usually do not conduct electricity.
• Good Conductors: Copper, Silver, Gold, Aluminum, Graphite
• Bad Conductors: Plastic, Rubber, Wood, Glass, Air

Last verified on 07-06-2026

Explanation

• Metals allow electricity to pass through them easily.
• Among all metals, silver has the highest electrical conductivity.
• Copper and gold are also very good conductors.
• Silver is widely used in high-precision electrical applications.
• Copper is commonly used in wiring due to cost-effectiveness.

Last verified on 16-05-2026

Explanation

• The 100 percent pure gold is 24-carat gold.
• Lower cartages contain less gold 18-carat gold contains 75 percent gold and 25 per cent other metals, often copper or silver.
• Carat is the unit of measurement for the physical weight of diamonds/gold.

Last verified on 02-04-2026

Explanation

• Protons and neutrons form the nucleus of an atom.
• Together, they are called nucleons because they are nuclear particles.

Additional information:

• Nucleons determine the mass of an atom.
• Isotopes are atoms of the same element with different number of neutrons.

Last verified on 07-03-2026

Explanation

A mixture of two or more metals (or a metal with non-metals) is called an alloy

An alloy is made by mixing metals.

It improves strength and durability.

Steel (iron and carbon), is an example of an alloy.

Explanation

Iron is the metal with the highest percentage in stainless steel

Iron (Fe):

The foundational element, providing the main structure, usually 60-75%.

Chromium (Cr):

Essential for rust resistance, forming a protective passive layer, typically 10.5% to 30%.

Nickel (Ni):

Added to enhance ductility, strength, and corrosion resistance, especially in austenitic grades (like 304 stainless steel, which has 8% nickel).

Carbon (C):

A small amount (under 1.2%) is present, influencing hardness and other properties. 

Explanation

Explanation

Geologists are scientists who study a planet's solid features, like soil, rocks, and minerals.

Explanation

The neutron is a neutral particle,

which is stable only in the confines of the nucleus of the atom.

Explanation

Stainless steel has the best corrosion resistance property. 

Stainless steel:

Due to its high chromium content, stainless steel forms a protective oxide layer on its surface when exposed to oxygen, significantly resisting corrosion. 

Aluminum steel:

While aluminum also forms a protective oxide layer, it is not as resistant to corrosion as stainless steel. 

Carbon steel:

Carbon steel lacks sufficient chromium and is highly susceptible to rusting.