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science exam

friday, november 8

how do you find protons? protons are the atomic number
are electrons always the same number as protons? yes
eletrons: positive, negative, nuetral?? negative
protons= ? positively charged
nuetrons =? neutral
how do you find how many nuetrons are in an element? atomic mass - atomic number = nuetrons
electrons exist in an ______ _______ electron cloud
where is the electron cloud located? outside of the nucleus
what does the kinetic energy of matter come from? the motion of electrons
primary energy levels are what? region around the nucleus of an atom where electrons may be found
there is a maximum of how many primary energy levels in an element? 7
each primary energy level is divided into one or more ___________ sublevels
the sublevels increase by one as they go up, except there is a maximum of ONLY -__ 4
sublevels are leveled with a number and ____ letter
each primary energy level consists of one or more sublevels, and each sublevel has a specific amount of orbitals. how many? s has one orbital. p has 3 orbitals. d has 5 orbitals. f has 7 orbitals.
what are valence electrons? electrons that, added up in the highest sublevel, equal valence electrons
an element is a substance that contains ___ only a single type of atom
you ______ (can,cannot) separate an element into other substances cannot
a compound always contains: two or more elements combined in fixed amounts
matter is a collection of: atoms
Created by: jemurph
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