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1. BON LISTER P. FACTORIN
Subject Teacher
Lesson 1

2. ATOM – smallest unit that makes up all matter.
- Subatomic particles: proton, neutron, electron.
Element- is a pure substance that represent the
species (variety) of a specific atom.
- Isotopes- atoms of the same element but with
different atomic mass (different number of
neutron)
Element is the identity; atom shows the variety.

3. • Proton- positively charged particle located in
the nucleus along with the neutron.
• Neutron- uncharged particle.
• Electron- negatively charged particle located
around the nucleus.

4. • Proton- positively charged particle located in
the nucleus along with the neutron.
• Neutron- uncharged particle.
• Electron- negatively charged particle located
around the nucleus.

5. BIG BANG THEORY
- explains the primordial creation and
expansion of space at the begining of time.
- the vast universe grew out of something
where all matter and energy were compressed
to infinite density and heated to trillions of
degrees.

6. • There are many theories to explain the origin of the
Universe, but the most sound is the BIG BANG.
• Big Bang Theory- postulates that the universe
emerged from a state of enormous density and
energy. Everything came from a single point and
expanded to now what we call the universe.
Proposed by Goerges Lemaitre

7. What is Big Bang Nucleosynthesis?
Nucleosynthesis refers to the process of creating new atomic
nuclei from pre-existing nucleons primarily protons and
neutrons.
As the universe expands, it cools.

8. The identity of an atom comes from the number of proton from
its nucleus.

10.  The same number of proton but differ in the number of
neutron.

13.  What do you think is the element formed?

14.  How many protons and neutrons are in the nucleus?
 What element formed?

15. The universe is said to contain:
• 75% Hydrogen
• 25% Helium
Light from distant galaxies are from glowing elements which emits
spectra of a particular frequencies primarily HYDROGEN AND HELIUM.

17. Light elements are formed through the process of Big Bang
Nucleosynthesis.