electron
Chapter 4 IPC Vocabulary
negatively charged particles inside the
atom
nucleus
positive charged, dense core of the
atom
proton
a subatomic particle that has a positive
charge and that is located in the
nucleus of an atom.
a subatomic particle that has no charge
and that is located in the nucleus of an
atom
tells you many protons are in the atom
of the element.
neutron
atomic number
mass number
isotope
unified atomic mass unit
equals the number of protons plus the
number of neutrons in an atom of the
element
an atom that has the same number of
protons but a different number of
neutrons relative to other atoms of the
same element.
is equal to one-twelfth of the mass of a
carbon- 12 atom
mole
a collection of a very large number of
particles.
orbital
region in an atom where there is a high
probability of finding electrons
valence electron
an electron that is found in the
outermost shell of an atom and that
determines the atom’s chemical
properties
photon
unit or quantum of light
scop/spec, spic
to look
ambul, grad, grade, gress
to walk, move around
dorm (i)
to sleep
ten, tim tain
to hold, grasp,have