Atomic Structure Flashcards
What are the three subatomic particles found in atoms?
Protons +
electrons -
neutrons/ no charge
what subatomic particles are found in the nucleus?
protons
neutrons
where are electrons found in atoms?
in the outer shell of the nucleus
What keeps electrons from flying off?
Electromagnetic force
stronger attraction to the protons ( the positive charge of the proton binds the electron from flying off)
- opposites attract
atoms of an element are defined by the number of?
protons
the identity of an element is determined by the number of protons
what is the atomic number
the number of protons in the nucleus of an atom
what is the mass total
the total number of protons ad neutrons in a nucleus
how many electrons does a neutral atom have
8 electrons
the same number of protons and electrons
Isotopes are atoms with a different number of…
neutrons
electrons in orbitals close to the nucleus are…
core
electrons in orbitals farthest from the nucleus are…
valence