chemistry 4
electron
a negatively charged subatomic particles
proton
a positive charge of subatomic particle
the number of proton is
an atomic number of that atom
define isotope
atom with the same number of proton but with different neutron
isotope
atom with the same number of protons but different neutron
mass number
number of proton plus neutron
neutron
subatomic particle with no charge
nucleus
the central part of an atom, containing protons andand neutrons
the element is determine by
the number of proton
atomic number
the number of proton in the nucleus of an element
maSS NUMBER of an atom is
the number of proton plus the number of neutron
atom
the smallest particles of an element that retain the pproperties of an element
atomic mass
the weighted average of the mass of the isotope of an element
Uranium-235 and uranium-238 are considered isotopes of one another. How are uranium- 235 similar, and how are they different?
they both have 92 proton , but U-235 has 143neutron and U-238 has 146 neutron
atomic mass unit
1/12th of the mass of a carbon atom with six protons and six neutrons