Atomic Structure Protons, Neutrons, and Electrons Section 4.3.
REVIEW Chemistry of Life & Properties of Water. Atomic number =# of protons = # of electrons.
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REVIEW Chemistry of Life & Properties of Water
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Transcript of REVIEW Chemistry of Life & Properties of Water. Atomic number =# of protons = # of electrons.
REVIEW
Chemistry of Life &
Properties of Water
Atomic number = # of protons = # of electrons
What is this?An atom
Of which element?
Lithium
What is a pure substance composed of two or more elements?
C6H12O6
COMPOUND
What is a pure substance composed of one type of atom?
ELEMENT
Element or compound?
C Ca
KO2
NaN2
ELEMENT or COMPOUND
Br
CaCl2BaCO3
H2 NCO2
How many electrons?
How many protons?
8
8
ELEMENT or COMPOUND
ELEMENT or COMPOUND
?Chemical bond
?Hydrogen bonds
Polar or
Nonpolar
Polar
Polar or
Nonpolar
Polar or
Nonpolar
Chemical bond where electrons are transferred?
Ionic bond
Chemical bond where electrons are shared?
Covalent bond
H2O
OH H
Water is polar!
Water has a high specific heat.
During the hot summer, the pond’s temperature remains at a warm 82° F. This is an example of
Water forms beads on the surface of this leaf. This is an example of
cohesion
Water sticks to the grass. This is an example of
adhesion
?cohesion
What happening on the surface?
?adhesion
What happening here?
?
Cohesion and adhesion occur because of
Hydrogen bonding
solventsolute ?
?
? ? ?
Why is the paper clip floating?
Surface tension
Why does water form a sphere in the space station?
Cohesion
? cohesion ? adhesion
Water is a common cleaning agent. It is most effective for dissolving substances with which characteristic?
a) polar bondsb) high densityc) high specific heatd) covalent bonding
What accounts for many of the unique properties of water that make it essential for life?a) covalent bonding between water moleculesb) covalent bonding between oxygen and hydrogenc) high specific heatd) hydrogen bonding between water molecules
What property of water allows ice to float?a) ice is less dense than liquid waterb) ice is more dense than liquid waterc) ice has a high specific heatd) water has a high specific heat
Which property causes the cohesion and adhesion of water molecules that moves water through a plant against the force of gravity?
a) density b) volumec) polarityd) heat capacity
Acid Base
Not completeExamples of ph
Study!!!!!
Everyone A’s and B’s
We can do this!!!!
