Explanation

Chemical changes involve a transformation where new substances with different properties are created.

It often through reactions like combustion, rusting, or digestion.

Explanation

Isobars are atoms of different elements that have the same mass number but different atomic numbers.

Example: Argon-40 and Calcium-40 both have mass number 40 but different atomic numbers.

Explanation

Oxygen has 8 protons and typically 8 neutrons, giving it a mass number of 16.

Mass number = Number of protons + Number of neutrons.

Explanation

Chlorofluorocarbons (CFCs) are chemical compounds that contain fluorine, carbon, and chlorine.

They were commonly used in refrigeration and air conditioning but are now regulated due to their role in ozone depletion.

Explanation

A solution is a homogeneous mixture where two or more substances are evenly distributed.

It consists of a solute (dissolved substance) and a solvent (the substance in which the solute dissolves).

Explanation

A saturated solution contains the maximum amount of solute that can dissolve at a given temperature.

Any additional solute will remain undissolved, as the solution has reached its limit.

Explanation

Jet fuel (aviation turbine fuel) is primarily refined from kerosene oil.

It provides high energy output and burns efficiently in jet and some rocket engines.

Explanation

Explanation

Explanation

Hydrogen is the lightest element, and its most common isotope (protium) has no neutrons in its atomic nucleus.

The atomic number of hydrogen is 1, which means it has one proton in its nucleus, but no neutrons.

The three main isotopes of hydrogen:

• Protium (1H): 1 proton, 0 neutrons
• Deuterium (2H or D): 1 proton, 1 neutron
• Tritium (3H or T): 1 proton, 2 neutrons