week 1: atom/matter Flashcards
atoms compose ______
all matter
3 basic particles of an atom
protons, neutrons, electrons
the nucleus is held together by a strong nuclear force that creates ________
binding energy
defined energy levels
electron shells
energy levels are each at a _________ from the nucleus
different distance
each electron shell is lettered beginning with ___ which is ________
“K”, nearest the nucleus
After “K,” the naming progresses in this way:
“L,” “M,” “N,” etc.
the shells fill from the K shell _______; the _________ may not fill completely
outward, outermost shells
how can the electron shell limit be found?
with the formula 2n^2
in the formula 2n^2 the n is the ________
shell number
the outermost shell can hold a maximum of ______
8 electrons
_____ = chemical shorthand
atomic nomenclature
the large letter is the ______
chemical symbol
the upper number is the _____________
atomic mass number
the lower number is the
atomic number
the _____________ tells you the number of protons/electrons
atomic number
the _________ tells you the number of protons/neutrons
atomic mass number
atomic number is the number of _____ in each atom
protons (and hence electrons)
atomic mass number is the number of _________ in each atom
neutrons and protons
The more complex the atom, the (greater/lesser) the opportunity for interaction
greater
positive ion occurs when _________
there are more protons than electrons
negative ion occurs when _____________
there are more electrons than protons
electrical charge is a ___________ of matter
characteristic
Who likened atoms to the solar system
Niehls Bohr