Question

$\huge\bold\color{teal}questions-$
$\pink{\mapsto \: what \: is \: matter \: ?}$
$\pink{\mapsto \:states \: of \: matter \: ? }$
$\pink{\mapsto \:define \: pure \: and \: impure \: substances \: ?}$
$\pink{\mapsto \: define \: atoms \: and \: molecules \: ? }$
$\pink{\mapsto \: what \: do \: you \: mean \: by \: element \: and \: compound \: ?}$
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$\small\fbox\purple{do \: not \: copy \: from \: any \: website}$_______________________






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Answer 1

• Matter is any substance that has mass and occupies some space.

• There are basically three States of matter, Solids, liquids and gases. But plasma is considered to be the 4th state.

• Pure substances:Pure substances have a perfectly homogeneous nature.Pure substances have a fixed density, melting point, boiling point etc. Pure substances are made up of only one type of atoms or molecules.

• Impure Substances:Impure substances do not have any specific properties. The properties of the resulting mixture are a result of the average properties of all its constituents.

• The smallest particle of an element, which may or may not have an independent existence is called an atom.

• Molecule is defined as group of two or more atoms of same element or different elements.

• Element is one of a class of substances that cannot be separated into simpler substances by chemical means. It's a pure substance whose atoms all have same number of protons.

• Compound can be separated into simpler substances by chemical means. A chemical compound is a chemical substance composed of many identical molecules held together by chemical bonds.

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Answer 2

Answer:

$\pink{\mapsto}$Matter is a substance that has inertia and occupies physical space. According to modern physics, matter consists of various types of particles, each with mass and size. ... Matter can exist in several states, also called phases. The three most common states are known as solid, liquid and gas.