Vocabulary Flashcards
A science that studies the matter and the changes that it undergoes.
chemistry
anything that has mass and takes up space
matter
is the ability to do work or produce heat
Energy
Pure substance
A single kind of matter with a specific composition and properties
Mixture
Physical combination of 2 or more substances p, in which they retain their distinct
physical change
Is when matter is the same, the original matter can be recovered, and the particles of the substances are rearranged
chemical change
is when the matter is different the old matter is no longer present and cannot be reverted, particles.
Are particles much smaller than atoms
subatomic particles
Isotopes
Atom of the same element with different number of neutrons and there for a differ in mass
quantum numbers
Information that indicates the location of the electrons
Electronic confirmation
Form of notation in which shows how the electrons are distributed among the atomic orbitals and energy levels
diagram orbitals
notations used to show how the orbitals of a sub shell are occupied by electrons
aufbau’s principle
established that new electron added to an atom, will enter in the available orbital , with less energy.
hund’s rule
one electron will enter each orbital with a parallel pin until all orbitals have one electron and only then will a second electron be added to those orbitals
paulli’s rule
Electrons in the same atom cannot have the same four quantum numbers (they must have opposite spins)
