Subatomic particles Flashcards
What is a proton?
A positively charged particle with a mass of one
What is an electron?
A negatively charged particle with no mass
What is a neutron?
A particle with no charge and a mass of one
What does the number of protons in an element correspond to?
Atomic number
What does the number of electrons in an element correspond to?
Number of protons
What does the number of neutrons in an element correspond to?
Rounded atomic mass - atomic number
What are isotopes?
Particles with the same number of protons but a different number of neutrons (same atomic # but different mass #)
What is an energy level diagram?
A representation of the electron arrangement
In an energy level diagram, what does the number of energy levels correspond to?
Period number»_space;>
What are valence electrons?
Electrons in the outermost energy level
What do valence electrons correspond to?
Group number
Energy level diagram for oxygen
6e-
2e-
------------
8p+
O
