Explanation

Explanation

Fluorine is the most electronegative element on the periodic table.

Fluorine is the most electronegative element because it has 5 electrons in its 2p shell.

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Explanation

Gamma rays have the shortest wavelength and highest energy in the electromagnetic spectrum.

They are produced in nuclear reactions.

They are used in medical treatments and scientific research.

Explanation

Ophthalmology is a branch of medical science dealing with the structure, functions, and diseases of the eye.

Ophthalmology means امراض چشم

Explanation

• The scientist who first discovered that the earth revolves around the sun was Copernicus.
• Earth's Rotational Theory:
  • Rotation can be defined as the spin of Earth on its own axis from west to east direction.
  • It must also be noted that the speed of rotation of the earth is not constant throughout latitudes.
    
  • It differs at different latitudes.

Explanation

Air is a homogeneous mixture of the gaseous substances

nitrogen,

oxygen, 

smaller amounts of other substances.

Explanation

A balloon is filled with a gas called helium.

while

A balloon filled with hydrogen gas moves in the upward direction

Explanation

Vestigial organs are organs, tissues or cells in a body

Which are no more functional the way they were in their ancestral form of the trait.

Explanation

Lactometer is used for milk

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A lactometer is an instrument that is used to check for the purity of milk by measuring its density.

 lactometer works on the principle of gravity of milk.

Sh10-8-2023

Explanation

In physics, the smallest unit of matter is the atom.

It's the smallest unit of matter that can't be divided using any chemical means.

Atoms are made up of a nucleus surrounded by electrons.