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PHYSIOLOGY - MARIEB 11E
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---18januari 20232022/2023A
- CONCEPT: FUNDAMENTAL CHEMISTRY 
Atoms: 
● All matter is made of atoms. Atoms contain protons, neutrons, electrons. 
□ Protons= (+) charge □ Neutrons= 0 charge □ Electrons= (-) charge 
□ Atoms start with protons=electrons, so that they are neutral—no net _______________________. 
● Atoms can gain or lose electrons to other atoms. When this happens, they become charged, and are called ions. 
□ An anion is an atom that has gained an electron—it’s a negative ion. 
□ A cation is...
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