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The Chemical Context of Life - Coggle Diagram
The Chemical Context of Life
Elements and Compunds
compounds
A compound is two or more elements
elements
An element is a substance that cannot be broken down to other substances by chemical reactions
20-25% of the 92 natural elements are required for life
CHON make up 96% of living matter while the other four percent is mainly mad up of calcium, phosphorus, potassium, and sulfur
metals nonmetals, metaloids
isotopes
radioactive isotopesdecay spontaneously
two atoms of an element that differ in the # of neutrons
The periodic table
Groups 1 - 8
the group # matches how many valence electrons it has
1st shell 2 electrons
2nd and third 8 electrons
Atomic # is the number of protons and electrons
atomic mass = neutrons + protons
Bonds
Van Der Waal
weakest
hydrogen bonds
covalent
polar and nonpolar
single double and triple bond
sharing od electrons
ionic
passing of electrons
subatomic particles
Protons
positive, in nucleus with nuetrons
Nuetrons
neutral, in nucleus with protons
Electrons
outside of nucleus
electronegativity - how stingy an element is with its electrons
polar means unequal sharing of electrons nonpolar means equal sharing of electrons
polar dissolves in water. nonpolar doesnt