Chapter 2 Flashcards
1
Q
proton
A
A subatomic negatively charged particle of an atom
2
Q
atomic mass unit
A
a unit that describes the mass of an atom or molecule
3
Q
neutron
A
a subatomic particle that has no charge at all
4
Q
atomic number
A
the number of protons in the nucleus of an atom
5
Q
isotope
A
an atom that has the same number of proton as other atoms of the same element do but that has a different number of neutrons
6
Q
mass number
A
the sum of the number of protons and neutrons in the nucleus
7
Q
atomic mass
A
the mass of an atom
