chapter 17 the atomic nature of matter
#s of nuetrons
2 isotopes of an element have different
all of the above
a molecule has
with each single breath
assuming all the atoms exhaled by julius caeser in his last dying breath are still in the atmosphere, then it is likely that we breathe one of those atoms
nucleus
at the center of every atom is a mass filled reigon called the
smaller than the wavelength of visible light
atoms are
molecules
atoms combine together to form
squeezing nuclei together inside stars
atoms heavier than hydrogen were made by
electron shell
elements that are above or below each other in the periodic table have one more or one less
proton
elements that are side by side in the periodic table have more or one less
2
how many different elements are in a water molecule?
2
how many electrons can the innermost shell of an atom have?
deuterium
if 1 neutron is added to a hydrogen nucleus the result is
carbon
if 2 protons are removed from an oxygen nucleus the result is
plasma
keep heating a gas and youll have a
plasma
most of the matter of the universe is in which phase?
in the deep interior of stars
nearly all the elements heavier than hydrogen that occur today were created
ancient stars
nuclei of atoms that make up a newborn baby were made in
all ove the above
plasmas
atoms
protons, neutrons, and electrons combine to form
of electrical forces
solid matter is mostly empty space. the reason solids dont fall through one another is bc
an ion
sometimes an atom has more or fewer electrons than it does protons, such an atom is called
all of the above
the air in your classroom has
positive
the charge on an atom that has one less electron than proton is
because of large electromagnetic repulsion forced
the reason nuclei dont pack together more closely is
the whole world
there are about as many atoms of air in our lungs at any moment as there are breaths of air in
elements
there are slightly more than 100 known atoms that combine to form all living and nonliving matter that we know about. these atoms are called
an electron microscope
to see a molecule you should use
the arrangements of electrons
what determines how atoms combine to form molecules ?
hydrogen
what is the most abundant element in the known universe ?
a nuetron
when a nucleon is electrically neutral, it is called
air
which of the following is not a compound