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biology
biology
39
Biology
9th Grade
09/10/2012

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Term
Matter
Definition
everything around you
Term
what is matter made up of
?
Definition
atoms
Term
atoms join together to make what?
Definition
compounds
Term
what are living things made up of?
Definition
chemical compounds
Term
atoms are the basic unit of what?
Definition
matter
Term
who came up with the term atom
Definition
democritus
Term
atom means?
Definition
not divisible
Term
came up with the idea that all matter could be broken down into small particles which couldn't be broken down any further
Definition
atoms are mostly what?
Term
atoms are made up of what?
Definition
subatomic particles
Term
what is a protons charge?
Definition
positive
Term
what is a neutrons charge?
Definition
neutral
Term
what is an electrons charge?
Definition
negative
Term
what is a protons amu?
Definition
1 AMU
Term
what does AMU stand for?
Definition
atomic mass unit
Term
whatever the amount of --- is thats the element listed under that number in the periodic table
Definition
protons
Term
what number and above means radioactive
Definition
82
Term
what is an electrons AMU?
Definition
0 AMU
Term
atoms of the same element with a different number of neutrons
Definition
isotope
Term
electrons basically, have no what?
Definition
mass
Term
the atomic mass is basically the amount of mass found in what?
Definition
an atom of an element
Term
atomic mass = what?
Definition
protons + neutrons
Term
radioactive means what?
Definition
unstable nucleus
Term
determines the age of rocks = what?
Definition
uranium
Term
determines the age of recent fossils (up to 50,000 years old)
Definition
carbon 14
Term
used to treat cancer
Definition
cobalt 60
Term
used as tracers to diagnose disease
Definition
iron 59
Term
atoms of elements join together to make what?
Definition
compounds
Term
atoms of elements join together to make compounds to reach what?
Definition
a lower energy level
Term
elements containing 1, 2, or 3 electrons in their outer energy levels react by what?
Definition
giving up electrons
Term
elements containing 5, 6, or 7 electrons in their outer energy levels react by what?
Definition
gaining electrons
Term
atoms chemically join together with other atoms to make what?
Definition
compounds
Term
atoms chemically join together with other atoms to make compounds to achieve what?
Definition
stability
Term
stability means each atom has how many electrons in their outer energy level
Definition
8
Term
atoms transfer electrons so each atom has 8 electrons in its outer energy level
Definition
ionic bonds
Term
atoms share electrons so each atom has 8 electorns in their outer energy level
Definition
covalent bonds
Term
sodium + chlorine =
Definition
sodium chloride
Term
the sharing of electrons
Definition
covalent bonds
Term
diatomics=
Definition
two atoms together
Term
7 diatomic occur naturally on the periodic table
Definition
H2 N2 O2 F2 Cl2 Br2 I2
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