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CGHS Biology - BioChemistry (Chemistry of Living Things)

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Sean Holder

on 7 October 2014

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Transcript of CGHS Biology - BioChemistry (Chemistry of Living Things)

Pay Attention
You'll See this
Next Year

What is Matter?
What is Chemistry?
An element is one particular type of atom - it cannot be broken by simple means
A molecule is two or more atoms held
together by covalent bonds
When one atoms meets another atom...
Physical Changes
Properties of Matter
BioChemistry - The Chemistry of Living Things
is the "scientific study of matter, its properties, and interactions with other matter and with energy".
Chemistry is everywhere in your life...you just have
to see it.
Matter is anything that has mass and takes up space
The Atom is the smallest basic unit of matter
If everything is made up of matter...what's the smallest bit of matter possible?
Atoms are made of 3 parts:
Positive particle - found in the nucleus
Neutral particle - found in the nucleus
Negative particle - found outside the nucleus (electron cloud)
What causes it to be a different element?
Different # of protons
If the # of Neutrons Change?
If the # of Electrons Change
Isotopes - elements with a
different number of neutrons
than normally exists
Ions - when an element
has a charge
Two types of ions
1) Cation
2) Anion
How to remember?
See a positive ion
C --- A --- + --- ion
A negative ion
Sodium (Na+ ), Potassium (K+), Calcium (Ca2+), Magnesium (Mg2+ ),
chloride (Cl-), phosphate (HPO42-), bicarbonate (HCO3-), and Sulfate (SO4-)
There are 92 naturally occurring elements
Of those, there are 6 main elements that make up all life on Earth.
These are recycled in the nutrient cycles
Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorous, Sulfur
It creates a compound
A compound is a substance made of atoms of different elements are bonded together.
Two Types of Bonds
Ionic Bonds
Covalent Bonds
forms when an electron is taken from one ion to another
forms when atoms share a pair of
Chemical Changes
changes affecting the form of a chemical substance, but do not change the chemical composition of that substance
substance combines with another to form a new substance. Changes the chemical composition.
Wrap - Up
1. What property distinguishes one element from another?

2. What is an ionic compound?

3. What is the different between a ionic and covalent bond?

4. How are molecules different from atoms?
Full transcript