Bio ch02 chemistry basis

KEY CONCEPT All living things are based on atoms and their interactions.

[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],Hydrogen atom (H) Oxygen atom (O) H O

[object Object],[object Object],[object Object],Oxygen atom (O) Nucleus: 8 protons (+) 8 neutrons outermost energy level: 6 electrons (-) inner energy level: 2 electrons (-)

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],O H H _ + +

[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],Sodium atom (Na) Chlorine atom (CI) Sodium ion (Na + ) Chloride ion (CI - ) Na loses an electron to CI ionic bond gained electron

[object Object],[object Object],[object Object],[object Object],covalent bonds Oxygen atom (O) Carbon atom (C) Oxygen atom (O) Carbon dioxide (CO 2 )

KEY CONCEPT Water’s unique properties allow life to exist on Earth.

[object Object],[object Object],[object Object],[object Object],[object Object],O H H _ + +

O H H _ + + O H H _ + + O H H _ + + O H H _ + +

[object Object],[object Object],[object Object],[object Object],[object Object],solution

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],more acidic stomach acid pH between 1 and 3

[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],bile pH between 8 and 9 more basic

[object Object],pure water pH 7

Bio ch02 chemistry basis

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