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