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