What s the matter
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What’s the Matter?. An introduction to matter and what it is made of. What is Matter?. Matter is what makes up all of the ‘stuff’ in the universe. Matter can have different properties such as size, texture, shape, hardness, color etc….

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What’s the Matter?

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What s the matter

What’s the Matter?

An introduction to

matter and what it

is made of.


What is matter

What is Matter?

  • Matter is what makes up all of the ‘stuff’ in the universe.

  • Matter can have different properties such as size, texture, shape, hardness, color etc….

  • However, all matter has mass and takes up space. Therefore it has density.

  • Matter is made of small particles called atoms.


Atoms

Atoms

  • Atoms are about one one-millionth the thickness of a human hair.

  • A speck of dust may contain about 3 trillion atoms.

  • Atoms are made up of smaller parts called subatomic particles.

  • The names of these particles are protons, neutrons, and electrons.


Picture of atom

Picture of Atom

Oops! Not that Atom!

www.allposters.com/adam-sandler_a14.htm


A diagram of the real atom

A diagram of the real Atom

This diagram is not to scale

Orbital


Electrons

Electrons

  • Negatively charged super tiny particles. Virtually no mass.

  • Surround the Nucleus (in the electron cloud)

  • Discovered by J. J. Thomson in 1897.


Protons

Protons

  • Protons are positively charged particles found within the atoms nucleus. They have a mass of 1 atomic mass unit.

  • Protons were discovered by Ernest Rutherford in experiments conducted between the years 1911 and 1919.

  • The number of protons in an atom determines what kind of atom it is. (oxygen has 8)


Neutrons

Neutrons

  • Neutrons are uncharged particles found within atomic nuclei.

    They have a mass of 1 amu.

  • Neutrons were discovered by James Chadwick in 1932.


Diagrams of atoms are often misleading

Diagrams of atoms are often misleading.

  • If the diagram below was a magnified picture of an actual atom

  • the electrons would be much smaller than the yellow dot.

  • They would still be invisible to your eye.

  • Also, the space between the nucleus of the atom and its

  • electrons would be much bigger. The electrons from this atom

  • would be found circling the nucleus from across the hall.


Other pictures of atoms

Other pictures of Atoms

Sometimes atoms are shown this way.

www.cfo.doe.gov/me70/manhattan/1890s-1939.htm

www.csmate.colostate.edu


Are all atoms the same

Are all atoms the same?

  • Atoms are not all the same but each atom is made from the subatomic particles protons, neutrons and electrons.

  • What makes atoms different from each other is how many of these subatomic particles the atom is made of.


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