Page 10 - Karan Yadav - MYP Year 1 Physical Science Booklet

Matter

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. The most familiar examples of material particles
are the electron, the proton and the neutron.

Combinations of these particles form atoms.

Neutron - A neutron is a subatomic particle found in the nucleus of
every atom except that of simple hydrogen. The particle derives its
name from the fact that it has no electrical charge; it is neutral.

Neutrons are extremely dense. Mass of one atomic mass unit.

Proton – a very small particle that exists in the nucleus of every atom
and has a positive charge of electricity. Mass of one atomic mass unit.

Electron - An electron is a negatively charged subatomic

particle. It can be either free (not attached to any atom), or
bound to the nucleus of an atom. Electrons in atoms exist in
spherical shells of various radii, representing energy levels.

The charge on a single electron is considered as the unit
electrical charge. Mass of zero atomic mass unit.

Nucleus - A nucleus is the positively charged centre of the
atom consisting of protons and neutrons. Nearly all the

mass of an atom is contained within the nucleus since
protons and neutrons have much more mass than electrons.

The video below will further elaborate and give in depth

understanding on the concept of matter and types of atoms.

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