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Mr, Turpin Benchmark 3 review

Review for Benchmark 3

Joshua Turpin

on 20 March 2013

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Transcript of Mr, Turpin Benchmark 3 review

The far left of the periodic table is where you can find the most reactive metals. Remember the stairway divides the metals and nonmetals What is the difference between a physical and chemical change? - A physical change is simply a phase change... the atoms remain the same like
water heating up to create water vapor Elements are made up of entirely
one type of atom... Atoms are made up of three particles Protons
Electrons The two particles that make up the nucleus
of an atom are the Protons and Neutrons. Benchmark #3
Review That means that the element Hydrogen
is made up of only Hydrogen atoms. The atomic number represents the amount of protons an atom has. The atomic mass represents the amount of protons and neutrons an atom has. Atoms sometimes react with each other to create something completely new... this chemical change when atoms combine create compounds. + Nitrogen + Oxygen -> NitrogenOxide Compounds have different properties
than the elements that formed them An atom will usually have the same number of protons and electrons. Over 99% of an atoms mass
is located in the nucleus, which means that less than 1% of an atoms mass is found in the electron cloud This last group of elements are called inert gases...
A characteristic of inert gases is that they do not naturally react with other atoms. Are good conductors of both heat and electricity Are brittle and poor conductors of heat and electricity Electrons are found in many different
energy levels surrounding the nucleus. A chemical change is when two
substances combine to create something completely different.
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