Some Basic Concepts of Chemistry:
Chemistry:
Define: Chemistry is the branch of science that deals with the properties, composition, and
structure of elements and compounds, how they can change, and the energy that is released or
absorbed when they change.
And
Chemistry is the study of the composition of matter and the changes that matter undergoes.
Explain:Chemistry is the science focused on the properties, composition, and structure of
elements and compounds, as well as the transformations they undergo and the energy
exchanged during these processes. Atoms serve as the fundamental building blocks of all
matter, meaning no substance can be broken down into anything smaller than its atomic unit.
Consequently, chemistry primarily investigates the behavior of atoms, the laws governing how
they combine, and how these interactions can be applied to achieve specific practical goals.
Main Branches of Chemistry:
Scope of Chemistry: In the scope of its subject, chemistry occupies an intermediate position
between physics and biology. It is sometimes called the central science because it provides a
foundation for understanding both basic and applied scientific disciplines at a fundamental
level.For example, chemistry explains aspects of plant growth (botany), the formation of igneous
rocks (geology), how atmospheric ozone is formed and how environmental pollutants are
, degraded (ecology), the properties of the soil on the Moon (cosmochemistry), how medications
work (pharmacology), and how to collect DNA evidence at a crime scene (forensics).
Importance of Chemistry: Chemistry affects nearly everything we see and every
action we take. Chemistry explains why milk that is left in the refrigerator for too long
turns sour. Chemistry explains why certain pollutants called chlorofluorocarbons
have done lasting damage to the ozone layer of our planet. Chemistry explains why
the leaves of deciduous trees turn from green in the summer to various shades of red
and yellow in the autumn.Figure;
Chemistry touches every area of our lives. The medicines we take, the food we eat,
the clothes we wear – all these materials and more are, in some way or another,
products of chemistry.
Matter:
Define: Matter is anything that has mass and takes up space by having volume.
Virtually everything around us is matter, including both living and nonliving things.
Explain: All everyday objects that can be touched are ultimately composed of atoms, which are
made up of interacting subatomic particles. In everyday as well as scientific usage, matter
generally includes atoms and anything made up of them, and any particles (or combination of
particles) that act as if they have both rest mass and volume. However it does not include
massless particles such as photons, or other energy phenomena or waves such as light or heat.
Note: The mass of an object is the quantity of matter it contains. Do not confuse an object’s
mass with its weight, which is a force caused by the gravitational attraction that operates on the
object. Mass is a fundamental property of an object that does not depend on its location.
In physical terms, the mass of an object is directly proportional to the force required to change
its speed or direction. Weight, on the other hand, depends on the location of an object. For
practical purposes, weight and mass are often used interchangeably in laboratories. Because the
force of gravity is considered to be the same everywhere on Earth’s surface, e.g 2.2 lb (a weight)
equals 1.0 kg (a mass), regardless of the location of the laboratory on Earth.
Types Of Matter: Matter is classified into two types ;
1) Physical Classification .
Chemistry:
Define: Chemistry is the branch of science that deals with the properties, composition, and
structure of elements and compounds, how they can change, and the energy that is released or
absorbed when they change.
And
Chemistry is the study of the composition of matter and the changes that matter undergoes.
Explain:Chemistry is the science focused on the properties, composition, and structure of
elements and compounds, as well as the transformations they undergo and the energy
exchanged during these processes. Atoms serve as the fundamental building blocks of all
matter, meaning no substance can be broken down into anything smaller than its atomic unit.
Consequently, chemistry primarily investigates the behavior of atoms, the laws governing how
they combine, and how these interactions can be applied to achieve specific practical goals.
Main Branches of Chemistry:
Scope of Chemistry: In the scope of its subject, chemistry occupies an intermediate position
between physics and biology. It is sometimes called the central science because it provides a
foundation for understanding both basic and applied scientific disciplines at a fundamental
level.For example, chemistry explains aspects of plant growth (botany), the formation of igneous
rocks (geology), how atmospheric ozone is formed and how environmental pollutants are
, degraded (ecology), the properties of the soil on the Moon (cosmochemistry), how medications
work (pharmacology), and how to collect DNA evidence at a crime scene (forensics).
Importance of Chemistry: Chemistry affects nearly everything we see and every
action we take. Chemistry explains why milk that is left in the refrigerator for too long
turns sour. Chemistry explains why certain pollutants called chlorofluorocarbons
have done lasting damage to the ozone layer of our planet. Chemistry explains why
the leaves of deciduous trees turn from green in the summer to various shades of red
and yellow in the autumn.Figure;
Chemistry touches every area of our lives. The medicines we take, the food we eat,
the clothes we wear – all these materials and more are, in some way or another,
products of chemistry.
Matter:
Define: Matter is anything that has mass and takes up space by having volume.
Virtually everything around us is matter, including both living and nonliving things.
Explain: All everyday objects that can be touched are ultimately composed of atoms, which are
made up of interacting subatomic particles. In everyday as well as scientific usage, matter
generally includes atoms and anything made up of them, and any particles (or combination of
particles) that act as if they have both rest mass and volume. However it does not include
massless particles such as photons, or other energy phenomena or waves such as light or heat.
Note: The mass of an object is the quantity of matter it contains. Do not confuse an object’s
mass with its weight, which is a force caused by the gravitational attraction that operates on the
object. Mass is a fundamental property of an object that does not depend on its location.
In physical terms, the mass of an object is directly proportional to the force required to change
its speed or direction. Weight, on the other hand, depends on the location of an object. For
practical purposes, weight and mass are often used interchangeably in laboratories. Because the
force of gravity is considered to be the same everywhere on Earth’s surface, e.g 2.2 lb (a weight)
equals 1.0 kg (a mass), regardless of the location of the laboratory on Earth.
Types Of Matter: Matter is classified into two types ;
1) Physical Classification .
