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17 terms

biology unit 2 quiz 2 lesson 1

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protons, neutron, electrons
three subatomic particles
neutron
carries no electrical charge
electron
carries the negative charge
proton
carries the possative charge
Neucleus
the mass of an atom is contained primarily in its
Atomic , neutrons
______mass is determined by the number of protons plus the number of_______
protons
the atomic number is determined by the number of
neutral
atoms are electrically _____ because they have the same number protons as electrons
carbon, hydrogen, oxygen, nitrogen
the principle elements in living things are
four elements that make up over 95 percent of the human body are
carbon, hydrogen, oxygen, nitrogen
92
how many elements have been found to occurr in nature
lavoisier
the eighteenth century chemist who proposed that all matter is composed from the same elements
diatomic, atom, element
Many gases exists as a ______ molecule of an ______ or ________
molecule
the smallest complete unit of a compound or diatomic gas
compound
a new sunstance formed by the combination of two or more different atoms
shell
path of electrons around an atomic nucleus
element
a substance consisting of only one type of atom