Brief introduction to atoms of elements - class-VIII

Early Indian philosophers classified matter in the form of five basic elements – the “Panch Tatva”– air, earth, fire, sky and water.

Subatomic particles are particles that are smaller than the atom. Protons, neutrons, and electrons are the three main subatomic particles found in an atom.

A mixture is made from different substances that are not chemically joined. 

Everything in this universe is made up of material which scientists have named "matter". 

Love cannot be considered as matter as it does not have mass and volume.

Matter is something that has mass and occupies space. 

Matter is something that occupies space and has volume.
Microwaves are a form of electromagnetic radiation with wavelengths ranging from one meter to one millimeter. 

Matter can move from one state to another, but can still be the same substance. A change of state, also called a phase change, is a physical change from one state of matter to another, 

Matter is something that has mass and occupies space. Helium is an inert gas which has mass and volume. Hence, it can be considered as a matter.

Matter is defined as something which has both mass and volume. 

All materials are made up of matter, and matter consists of particles such as atoms, ions or molecules.

Matter can be classified chemically as pure substance (elements and compounds) and mixture or impure substance.

On the basis of composition, matter can be classified as compound, element and mixture. Solids, liquids and gases are physical states of matter.

Anything that occupies space and has mass is called as matter. Smell, love and cold does not occupy space and has no mass. Hence, they are not matter.

There are three states of matter: Solid, liquid, gases.

The state or phase of a given set of matter can change depending on pressure and temperature conditions, transitioning to other phases as these conditions change to favor their existence; for example, solid transitions to liquid with an increase in temperature. Near absolute zero, a substance exists as a solid.

Anything that has mass and posses space is known as matter.

The matter can be perceived through our senses. Example: water is matter and we can sense it by touching it and by seeing it.

Matter is defined as anything that has mass and occupies space. Light is a form of energy, not matter.

When a low-density substance is replaced by high-density substance,the overall density increases.Here air which has low density compared to water is replaced.So,the overall density increases while in removing cases overall density decreases.

In solid state the intermolecular forces are maximum and the molecules are very closely packed.

P = lodine $\displaystyle 1 _{2}$, dark coloured  violet solid Q = NaCl, recovered  from sea on large scale. R = Nephathalene, used in the from of small balls for safe storage of woolen clothes S = $\displaystyle NH _{4}Cl$, used in dry cells
T = TIncture iodine, a solution of iodine in alcohol as antiseptic 

Noise, vacuum and light flash are not the examples of matter.

There are more phases of matter which aren't as familiar nor do we see them every day. Some exist only in theory, others can be reproduced in laboratories, some are so new that scientists are still figuring out the details and others might exist, but have not yet been found in nature. They include: quark-gluon plasmas, Bose-Einstein condensates, fermionic condensates, strange matter, liquid crystals, quantum spin liquid (QSL), superfluids, supersolids and the paramagnetic and ferromagnetic phases of magnetic materials.

Chair, Air, Cold drink, Almonds are matters as they have mass and occupy space. 

Matter is defined as anything that occupies space and has mass. Matter occurs in one of three states: Solid, liquid or gas. 

Any material can be seen if the molecules are dense or large but if the molecules are scattered like in gaseous state one cannot see it so every matter can be seen is a false statement.

Matter is a substance which has mass and takes up space by volume the properties of matter are,

There are many possible definitions of Matter. Matter is termed as any substance that has mass and occupy space.

Atom is the smallest unit of matter that still retains its chemical identity.Atoms can be broken down into electrons,neutrons and protons which can be further broken down into quarks.Atoms differ from each other with different chemical properties.

The inner planets (terrestrial planets) are composed primarily of rock and metal, which consist of heavier elements, whereas the outer gas giants are composed mostly of lighter gases.