Atoms and Periodic table .pdf
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Complete the “Do Now” and
I CAN understand that the atomic number is
unique to each element and is the number of
protons in the nucleus of the element.
I CAN Use the periodic table to understand
important patterns in properties of elements.
atom: the smallest unit of matter that cannot be separated
by physical or chemical
subatomic particles: the particles that make up an atom
nucleus: the positively charged center of the atom
proton: positively charged particles in the nucleus of an atom
neutrons: particles in the nucleus of an atom that have NO
electrons: negatively charged particles in atoms. Found
outside the nucleus in an area called the electron cloud
element: any material that is made up of one type of atom
atomic mass unit (AMU): the mass of one proton
Atoms! The Legos of
I. The Atom
atom: the smallest unit of an element
that keeps the properties of that
à“atom” is from the Greek word
“atomos” which means “not able to
How small is an atom?
A single penny has 2 x 10^22 atoms or
What are three subatomic particles of
II. Inside the atom
All atoms are made of the same 3
subatomic (smaller than an atom)
II. Inside the atom…