Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
21 Cards in this Set
- Front
- Back
|
the smallest particle of an element
|
atom
|
|
|
negitave charged particles
|
electron
|
|
|
the center of a positive charge
|
nucleus
|
|
|
positive charged particle
|
proton
|
|
|
the specific amount of energy an electron has
|
energy level
|
|
|
a netural particle
|
neutron
|
|
|
the # of protons in the necules of an atom in an element
|
atomic number
|
|
|
atoms w/ the same # of protons & a diffrent # of neutrons
|
isotopes
|
|
|
the # an isotope is identified by
|
mass number
|
|
|
the average mass of all the isotopes in an element
|
atomic mass
|
|
|
list of all the emlements from each period
|
periodic table
|
|
|
horizontal rows on the periodic table
|
periods
|
|
|
18 vertical colums on the periodic table
|
groups
|
|
|
stands for the element below the atomic number
|
chemical symbol
|
|
|
a state of matter that consists of a gas-like mixture of free electrons & nuclei of atoms that have been striped of electrons
|
plasma
|
|
|
process in which 2 atomic nuclei combine, forming a larger nucleus
|
nuclear fusion
|
|
|
why did the atomic theory change over time?
|
people learned more about atoms
|
|
|
what was Bohr's theory about atoms?
|
he thought atoms were uncuttable
|
|
|
what is the diffrence between the modern atoms, and Bohr's atom?
|
we have better techonology to make the atoms more accurate
|
|
|
what are the 3 main particles of a modern atom model??
|
proton
neutron electron |
|
|
what is an atmomic # and how is it used?
|
it tells the # of protons in an atom to find its positive charge
|
