General Biology 2

Chemistry Within Biology

- Focus on atoms and macromolecules

- 4 important atoms; Hydrogen, nitrogen, carbon, and oxygen

- a total of 92 elements

- 27 essential within Periodic table

- 4 make up 96 %

3 different particles:  1. Proton (+) 2. electron (-) 3. Neutron

-Proton & neutron : mass of the atoms -> Nucelus

-Electrons are spanning around nucleus

-Negative of electrons are attracted to protons (+)

-Simple concept of +and - attraction

Atoms :

Atomic number is on the top