Studied by 15 peopleatom
smallest unit of an element that retains the properties of that element.
proton charge
positive
proton mass
1 amu (+)
what is inside the nucleus?
proton and neutron
neutron charge
neutral
neutron mass
1 amu (=)
electron charge
negative
mass of electron
no mass (≈ zero)
where is electron locacted
outside nucleus (electron cloud)
nucleus charge
positive
the nucleus is almost…
all the mass of the atom
electron cloud is where most of the…
volume is
atomic number
number of protons
what does the number of protons determine?
the element
atomic number
number of protons
Mass Number
sum of protons and neutrons
superscript of nuclear symbol
mass number
subscript of nuclear symbol
atomic number
Hyphen notation
the mass number is written with a hyphen after the element name
nuclear symbol
a type of shorthand notation that identifies the element (by symbol or atomic number) and the mass number of the element
7
Li
3
atomic number?
3
7
Li
3
mass number?
7
7
Li
3
number of protons?
3 protons
7
Li
3
number of neutrons?
4 neutrons
7
Li
3
number of electrons?
3 electrons
periodic table atomic number is a
whole number
average atomic mass has ______ on the periodic table
decimals
average atomic mass
79.904 amu
mass number
80
atomic number
35
number of protons, neutrons, electrons (x, y, z)
35, 45, 35
Note 
Flashcard (75)