atomic structure Flashcards
1
Q
the smallest unit of an element
A
atom
2
Q
a subatomic particle that has a negative charge
A
electron
3
Q
in physical science, an atom’s central region, contains protons and neutrons
A
nucleus
4
Q
a subatomic particle that has a positive charge
A
proton
5
Q
a subatomic particle that has no charge
A
neutron
6
Q
a region around the nucleus of an atom where electrons are found
A
electron cloud
7
Q
the number of protons in the nucleus of an atom, identifies the atom
A
atomic number
8
Q
the sum of the numbers of protons and neutrons
A
mass number
